Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
thanh vi » thanh va, thanh ve, nhanh vi
sang ky » sang kyo, dang ky, tang ky
cao hoi » cau hoi, co hoi, cao hoc
nam luc » nang luc, nhan luc, nam thuc
luc van » luoc van, luu van, duc van
san ky » van ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((san ky) OR (sang ky)) nang cao hoi. thien van nam luc van ((thanh vi) or (hanh vi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((san ky) OR (sang ky)) nang cao hoi. thien van nam luc van ((thanh vi) OR (hanh vi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((san ky) OR (sang ky)) nang cao hoi. thien van nam luc van ((thanh vi) or (hanh vi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((san ky) OR (sang ky)) nang cao hoi. thien van nam luc van ((thanh vi) or (hanh vi)) cua triet*.