Perhaps you should try some spelling variations:
ban thanh » ban hanh
cua viet » ca viet, hoa viet, cua vat
ban hang » ngan hang
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
lang ha » long ha
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
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: su sach ly ((nang xa) or (lang ha)) hoi. hieu va cam tuc ((ban thanh) or (ban hang)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((nang xa) OR (lang ha)) hoi. hieu va cam tuc ((ban thanh) OR (ban hang)) vi cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ly ((nang xa) or (lang ha)) hoi. hieu va cam tuc ((ban thanh) or (ban hang)) vi cua viet*.