Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
duoc van » duoc va, duc van, duoc ban
lam duoc » nam duoc, luat duoc, lam thuoc
vai cua » dai cua, hai cua, lai cua
thi van » thi lan, thi hanh, thi nang
sach ly » sach y, sach lo, sach hay
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ly) or (sach ty)) nang xa hoi. ((thien van) OR (thi van)) lam duoc van hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach ty)) nang xa hoi. ((thien van) OR (thi van)) lam duoc van hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) or (sach ty)) nang xa hoi. ((thien van) OR (thi van)) lam duoc van hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach ty)) nang xa hoi. ((thien van) OR (thi van)) lam duoc van hanh vai cua triet*.