Perhaps you should try some spelling variations:
hanh khuan » khang khuan, khanh thuan, anh chuan
khoa thong » hoa thong, thoai thong, pho thong
thuoc hanh » thuoc thanh, thuoc hinh, thuoc khang
bai thuoc » ban thuoc, bai hoc, cay thuoc
tu tac » tu trac, tu tai, tu bac
tac va » tac da, tac xa, tuc va
thuc » thu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu tac va thuc hanh khuan khoa thong ) or ( tu cac bai thuoc hanh khuan khoa thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu tac va thuc hanh khuan khoa thong ) OR ( tu cac bai thuoc hanh khuan khoa thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu tac va thuc hanh khuan khoa thong ) or ( tu cac bai thuoc hanh khuan khoa thong ))*.