Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
nang co » nang doc, nang noi, nang hoc
thi van » thi lan, thi hanh, thi nang
luu van » cuu van, luu hanh
vai cua » dai cua, hai cua, lai cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
luan » quan, lan

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