Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
hai cau » hai chau, hai chu, hai hau
va hanh » van hanh, va danh, ban hanh
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
ma hoi » mai hoi, xa hoi, ma hoa

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 (vu bach)) ky nang ma hoi. hieu van cam xuc ((va hanh) or (va thanh)) hai cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) ky nang ma hoi. hieu van cam xuc ((va hanh) OR (va thanh)) hai cau theo.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) ky nang ma hoi. hieu van cam xuc ((va hanh) or (va thanh)) hai cau theo*.