Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, chao xu, chat cua
hieu cac » hieu luc, hieu va, hieu van
sach thu » sach thue, sach thieu, sach tham
sach ty » sach y, sach tu, xach tay
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach thu)) nang o hoi. hieu cac ((chat xuc) OR (cam xuc)) van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) nang o hoi. hieu cac ((chat xuc) OR (cam xuc)) van hanh dai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thu)) nang o hoi. hieu cac ((chat xuc) OR (cam xuc)) van hanh dai cua triet*".