Perhaps you should try some spelling variations:
cay thuoc » cua thuoc, nam thuoc, va thuoc
nhan luc » nang luc
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu
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: su sach y nang o hoi. hieu qua ((nam thu) or (((cay thuoc) or (nhan luc)))) van hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang o hoi. hieu qua ((nam thu) OR (((cay thuoc) OR (nhan luc)))) van hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach y nang o hoi. hieu qua ((nam thu) or (((cay thuoc) or (nhan luc)))) van hanh vi cua tu*.