Perhaps you should try some spelling variations:
tinh viec » tinh viet, dinh viec, sinh viec
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, mang may
nam luc » nang luc, nhan luc, nam thuc
va tinh » may tinh
tu sac » tu cac, tu san, tu bac
va nam » van nam, ha nam, va nay
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 sac) or (tu sach)) ky ((nang ma) or (nang cao)) hoi. lieu va nam luc va tinh viec cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky ((nang ma) OR (nang cao)) hoi. lieu va nam luc va tinh viec cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu sach)) ky ((nang ma) or (nang cao)) hoi. lieu va nam luc va tinh viec cua viet*.