Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh thuc » trinh tu, trinh thi
lieu tinh » trieu tinh, diep tinh, bien tinh
thuc dung » thuoc dung, thuy dung, tuc dung
bac thanh » ban thanh, cac thanh, tai thanh
tac nhan » tao nhan, cac nhan, dac nhan
so lieu » so dieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so lieu tinh - hanh trinh thuc dung trong ((bac thanh) or (tac nhan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so lieu tinh - hanh trinh thuc dung trong ((bac thanh) OR (tac nhan)) cau.
• Adding a wildcard symbol may retrieve word variants: so lieu tinh - hanh trinh thuc dung trong ((bac thanh) or (tac nhan)) cau*.