Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
day vat » duy vat, dan vat, dang vat

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach tu nang xa hoi. hieu ve pham ((day va) OR (day vat)) thanh dai cua triet~.
• Adding a wildcard symbol may retrieve word variants: thuat sach tu nang xa hoi. hieu ve pham ((day va) or (day vat)) thanh dai cua triet*.