Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
sang ky » sang kyo, tang ky, bang ky
dang ky » dang y, dan ky, dong ky
cao hoi » cau hoi, cao hoc, tao hoi
thi van » thi lan, thi hanh, thi nang
nam luc » nang luc, nhan luc, nam thuc
luc van » luoc van, luu van, duc van
vai cua » dai cua, hai cua, lai cua
co hoi » co hoc, co loi

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

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