Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
hanh lai » hanh lam, hanh tai, thanh lap
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
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: toc sach ((ty nang) or (ty hang)) co hoi. hieu van tham nuoc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty nang) OR (ty hang)) co hoi. hieu van tham nuoc va hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty nang) or (ty hang)) co hoi. hieu van tham nuoc va hanh lai cua tre*.