Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hanh hai » thanh hai, nhanh hai, hang hai
cau theo » cau thi, cau tao
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hai cau » hai chau, hai chu, hai hau
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va

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) OR (hieu va)) cam xuc va hanh 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) OR (hieu va)) cam xuc va hanh hai cau theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu bach)) ky nang ma hoi. ((hieu van) OR (hieu va)) cam xuc va hanh hai cau theo".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) ky nang ma hoi. ((hieu van) OR (hieu va)) cam xuc va hanh hai cau theo*.