Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
thu sach » tu sach, thuat sach, thuoc sach
cam thuc » am thuc, nam thuc, cam thu
thuc ban » thuoc ban, thuc dan, thu ban
thanh vi » hanh vi, thanh va, thanh ve
va triet » va thiet, va trien, ve triet
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (thu sach)) ky nang x hoi. hieu va cam thuc ban thanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thu sach)) ky nang x hoi. hieu va cam thuc ban thanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thu sach)) ky nang x hoi. hieu va cam thuc ban thanh vi va triet*.