Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham thuc » phap thuc, pham chuc, nham thuc
sach thu » sach thue, sach thieu, sach tham
vat hanh » vat thanh, van hanh, va hanh
hanh dai » hanh tai, hanh dao, vanh dai
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
hieu vi » hieu voi, hieu va, hieu ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ty) OR (sach thu)) nang xa hoi. hieu vi pham thuc vat hanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ty) OR (sach thu)) nang xa hoi. hieu vi pham thuc vat hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ty) OR (sach thu)) nang xa hoi. hieu vi pham thuc vat hanh dai cua triet*.