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, cao hoc, tao hoi
hieu va » lieu va, hieu qua
nam luc » nang luc, nhan luc, nam thuc
luc may » truc may, phuc may
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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: tu sac ky nang ((cao hoi) or (co hoi)). ((hieu van) OR (hieu va)) nam luc may tinh vien cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((cao hoi) OR (co hoi)). ((hieu van) OR (hieu va)) nam luc may tinh vien cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((cao hoi) or (co hoi)). ((hieu van) OR (hieu va)) nam luc may tinh vien cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((cao hoi) or (co hoi)). ((hieu van) OR (hieu va)) nam luc may tinh vien cua triet*.