Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nha thuoc, cay thuoc
dan thuc » dan toc, am thuc
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
ly nang » ky nang, ly hang, ly vang
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
sach ly » sach y, sach lo, sach ty
cua tu » cua tuc, cua su, cua cu
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ly nang o hoi. hieu ve ((nam thu) or (((nam thuoc) or (dan thuc)))) van hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang o hoi. hieu ve ((nam thu) OR (((nam thuoc) OR (dan thuc)))) van hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: vu sach ly nang o hoi. hieu ve ((nam thu) or (((nam thuoc) or (dan thuc)))) van hanh vai cua tu*.