Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thi hanh » thi thanh
thanh vi » hanh vi, thanh va, thanh ve
cao hoi » cau hoi, co hoi, cao hoc
thi van » thi lan, thi nang
luu van » cuu van, luu hanh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
luan » quan, lan

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

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