Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » vu sach
vai cuu » vai cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
cao hoi » cau hoi, co hoi, cao hoc
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo

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) or (so sach)) ky nang cao hoi. hieu van cac xuc ((va hanh) or (va danh)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang cao hoi. hieu van cac xuc ((va hanh) OR (va danh)) vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang cao hoi. hieu van cac xuc ((va hanh) or (va danh)) vai cuu tre*.