Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ang xa » mang xa, dang xay, hoang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((ang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu va)) pham duc ban hanh vai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((ang xa) OR (lang xa)) hoi. ((hieu ve) OR (hieu va)) pham duc ban hanh vai cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((ang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu va)) pham duc ban hanh vai cua thuoc".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((ang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu va)) pham duc ban hanh vai cua thuoc*.