Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
thi hanh » thi thanh
thanh vi » hanh vi, thanh va, thanh ve
cao hoc » co hoc, chat hoc
cho hoc » co hoc, khoa hoc
thi van » thi lan, thi nang
nam cuu » nam cua, nam suu, nam cau
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

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