VueJS Search for exact word or phrase

Question

Im querying data which is pulled in via an Axios call. The drop-down 'subjects' pulls back results and queries the data but I would like it to only pull back exacts. For example, if I select 'English', I just want it to return subjects which have the subjects 'English' and not the subjects which are 'English and maths'.

Would I use a regEx. If so how would I go about this? Any help appreciated.

 <select  v-model="subject"
                    class="form-control"
                    @change="subjectonchange()"
                    :disabled="selectDisabledSubject"
                  >
                    <option disabled value="">Select subject</option>
                    <option
                      v-for="subject in uniquesubjects"
                      :key="subject"
                      :value="subject"
                    >
                      {{ subject }}
                    </option>
                  </select>

method: { subjectonchange: function () {
          let query = "";
          if (this.subject !== "") {
            query = this.subject;
            console.log(this.subject);
          } else {
            query = "!showall";
          }
          this.query(query);
        },}