Perhaps you should try some spelling variations:
trinh viet » ninh viet, trinh vat
cua triet » cua viet, su triet, va triet
cam cuc » cam xuc, cham cuu, pham cuc
tinh vi » trinh vi, tinh voi, tinh va
cuc ban » cua ban, cac ban, cuu ban
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
ve cam » ve cham, ve cac, va cam

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 tang xa hoi. hieu ve cam cuc ban ((tinh vi) or (trinh viet)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky tang xa hoi. hieu ve cam cuc ban ((tinh vi) OR (trinh viet)) cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky tang xa hoi. hieu ve cam cuc ban ((tinh vi) or (trinh viet)) cua triet*.