Perhaps you should try some spelling variations:
tinh viec » tinh viet, dinh viec, sinh viec
va triet » va trien, ve triet, cua triet
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nam luc » nang luc, nhan luc, nam thuc
tu sac » tu cac, tu san, tu bac
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa
thiet » thieu

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