Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
cam thuc » am thuc, nam thuc, cam thu
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
vai va » mai va, dai va, hai va
x hoi » xa hoi, o hoi, x ho
vi va » vi van, vu va, bi 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) OR (vai 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) OR (vai va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (thu sach)) ky nang x hoi. hieu va cam thuc ban thanh ((vi va) OR (vai 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) OR (vai va)) triet*.