Perhaps you should try some spelling variations:
khac tren » khac triet, khac trong, hoc tren
pho thong » he thong
tren thuc » trien thuc, tron thuc, trinh thuc
khoan pho » khoan nhoi, khoan phai, khoan hoi
sanh tam » canh tam, hanh tam, sang tam
tam thuc » tham thuc, am thuc, nam thuc
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa pho » khoa phu, khoa khoa, khoa phau
thuc cac » thuc cach, tuc cac, phuc cac
so sanh » do sanh
vu khac » vu kham, vu khanh, bui khac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sanh tam thuc anh khoa pho thong ) or ( vu khac tren thuc cac khoan pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh tam thuc anh khoa pho thong ) OR ( vu khac tren thuc cac khoan pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh tam thuc anh khoa pho thong ) or ( vu khac tren thuc cac khoan pho thong ))*.