Perhaps you should try some spelling variations:
ninh viec » ninh viet, dinh viec, sinh viec
cua triet » cua viet, su triet, va triet
cham loc » cham soc, chon loc, cham o
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va ninh » van ninh, va kinh, va tinh
loc va » hoc va, luc 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 sach) or (te sach)) ky nang ma hoa. hieu va cham loc va ninh viec cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ma hoa. hieu va cham loc va ninh viec cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ma hoa. hieu va cham loc va ninh viec cua triet*.