Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
toc sach » hoc sach, doc sach, thuoc sach
tang van » dang van, hoang van, trong van
thai hoc » dai hoc, bai hoc, hoi hoc
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
thai do » thay doi, thai den
hieu va » lieu va, hieu qua
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, kho tang
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (toc sach)) ky tang van hoi. hieu va ((thai hoc) or (thai do)) va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky tang van hoi. hieu va ((thai hoc) OR (thai do)) va hanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky tang van hoi. hieu va ((thai hoc) or (thai do)) va hanh dai cua te*.