Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh viec » tinh viet, dinh viec, sinh viec
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
nang ma » tang ma, nang cao, mang may
va tinh » may tinh
sang ma » tang ma, sang tao, mang may
nam luc » nang luc, nhan luc, nam thuc
luc va » duc va, tuc va, loc va
tu sac » tu cac, tu san, tu bac
va nam » van nam, ha nam, va nay

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