Perhaps you should try some spelling variations:
tinh viec » tinh viet, dinh viec, sinh viec
va triet » va thiet, va trien, ve triet
hieu van » thien van, lieu va, hieu ve
nam luc » nang luc, nhan luc, nam thuc
viec va » vien va, viec cua, viec lam
tu bach » vu bach, tu cach, tu hach
nang ma » tang ma, sang ma, nang cao
va tinh » may tinh
hieu va » lieu va, hieu qua
luc va » duc va, tuc va, loc va
tu bac » tu ban, tu cac, tu bat
ma hoi » mai hoi, xa hoi, ma hoa

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

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