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

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