Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua quoc » cua nuoc, cua thuoc
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
van nang » van quang, van ban, van dong
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
tu sach » thu sach, su sach, te sach
lai hoi » dai hoi, lai hoa, lai roi
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat sach)) ((y nang) or (van nang)) lai hoi. hieu van cac xuc van hanh vi cua quoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ((y nang) OR (van nang)) lai hoi. hieu van cac xuc van hanh vi cua quoc.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ((y nang) or (van nang)) lai hoi. hieu van cac xuc van hanh vi cua quoc*.