Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh viec » dinh viet, sinh viec, sinh vien
hieu van » thien van, lieu va, hieu ve
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
nam luc » nang luc, nhan luc, nam thuc
va dinh » van dinh, va kinh, va tinh
nang ma » sang ma, nang cao, mang may
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
tu sac » tu sach, tu cac, tu san

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 ma) OR (tang ma)) hoi. ((hieu van) or (hieu va)) nam luc va dinh viec cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ma) OR (tang ma)) hoi. ((hieu van) OR (hieu va)) nam luc va dinh viec cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) OR (tang ma)) hoi. ((hieu van) or (hieu va)) nam luc va dinh viec cua triet*".