Perhaps you should try some spelling variations:
thien van » thi van
so sach » so sanh, bo sach, co sach
cao hoi » cau hoi, co hoi, cao hoc
nam luc » nang luc, nhan luc, nam thuc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ca su » cua su, ca sau, va su
tuan » quan, tran, luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang cao hoi. thien van nam luc ((va hanh) or (tuan anh)) ((ca su) or (cao su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang cao hoi. thien van nam luc ((va hanh) OR (tuan anh)) ((ca su) OR (cao su)) triet.
• Adding a wildcard symbol may retrieve word variants: so sach y nang cao hoi. thien van nam luc ((va hanh) or (tuan anh)) ((ca su) or (cao su)) triet*.