Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh vien » sinh vien, tinh dien, tinh viet
hieu van » thien van, lieu va, hieu ve
vien cua » viec cua, dien cua, tien cua
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
nam luc » nang luc, nhan luc, nam thuc
va tinh » may tinh
tu sac » tu sach, tu san, tu bac
luc va » duc va, tuc va, loc va

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

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