Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hang » ngan hang
van hac » van hoc, van hai, van chat
ty nang » ky nang, ty hang, ly nang
hang vi » hang va, hanh vi, hang di
ma hoi » mai hoi, xa hoi, ma hoa
van ha » van hoa, van chat, van hanh
da ban » dia ban, dua ban, day ban
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) or (ty xang)) ma hoi. hieu ((van hac) or (van ha)) da ban hang vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty xang)) ma hoi. hieu ((van hac) OR (van ha)) da ban hang vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty xang)) ma hoi. hieu ((van hac) or (van ha)) da ban hang vi cua vat*.