Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang van » dang van, tang van, lang van
hieu van » hieu va, thien van, hieu ve
hanh dai » hanh tai, hanh dao, vanh dai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
van hoc » van hoa
va hanh » van hanh, va thanh, va danh
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 (thu sach)) ky nang van hoc. ((hieu van) or (lieu va)) cam xuc va hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky nang van hoc. ((hieu van) OR (lieu va)) cam xuc va hanh dai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky nang van hoc. ((hieu van) or (lieu va)) cam xuc va hanh dai cua viet*.