Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
hanh lai » hanh lam, hanh tai, thanh lap
lai cuoc » tai cuc, va cuoc, lai cua
cuoc tre » cuoc tro, nuoc tren, duoc tren
te sach » toc sach
ty nang » ky nang, ty hang, ly nang
va hanh » van hanh, va thanh, va danh
co hoi » co hoc, co loi

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 nang) OR (ty xang)) ((cau hoi) or (co hoi)). hieu van tham nuoc va hanh lai cuoc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty xang)) ((cau hoi) OR (co hoi)). hieu van tham nuoc va hanh lai cuoc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty xang)) ((cau hoi) or (co hoi)). hieu van tham nuoc va hanh lai cuoc tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ty xang)) ((cau hoi) or (co hoi)). hieu van tham nuoc va hanh lai cuoc tre*.