Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
nang xa » nang x, lang xa, nang ma
cac xuc » cac nuoc, chat xuc, cac cuoc
va hanh » van hanh, va thanh, va danh
sac ky » sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) OR (cac ky)) nang xa hoi. hieu van ((cac xuc) or (cam xuc)) va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) nang xa hoi. hieu van ((cac xuc) OR (cam xuc)) va hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) OR (cac ky)) nang xa hoi. hieu van ((cac xuc) or (cam xuc)) va hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) OR (cac ky)) nang xa hoi. hieu van ((cac xuc) or (cam xuc)) va hanh dai cua triet*.