Perhaps you should try some spelling variations:
tinh viec » tinh viet, dinh viec, sinh viec
cua triet » su triet, va triet
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua vat
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
nam luc » nang luc, nhan luc, nam thuc
va tinh » may tinh
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 cac ky ((nang ma) OR (tang ma)) hoi. hieu van nam luc va tinh viec ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((nang ma) OR (tang ma)) hoi. hieu van nam luc va tinh viec ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky ((nang ma) OR (tang ma)) hoi. hieu van nam luc va tinh viec ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((nang ma) OR (tang ma)) hoi. hieu van nam luc va tinh viec ((cua triet) or (cua viet))*.