Perhaps you should try some spelling variations:
su sach » vu sach
cac tuc » cac toc, cac tu, cac tac
vai cua » dai cua, hai cua, lai cua
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
dao vai » dao van, dao va, dao bai
hieu ve » hieu van
hieu va » lieu va, hieu qua
va dao » ca dao
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
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 (so sach)) ky nang ma hoi. ((hieu ve) or (hieu va)) cac tuc va dao vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang ma hoi. ((hieu ve) OR (hieu va)) cac tuc va dao vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky nang ma hoi. ((hieu ve) or (hieu va)) cac tuc va dao vai cua te*".