Perhaps you should try some spelling variations:
ban thanh » ban hang
su triet » su viet, su tien, ve triet
ban hanh » ban hang
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va cam » va cham, va cac, va cao
di su » doi su, ki su, da su

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 xa)) hoi. hieu va cam tuc ((ban thanh) OR (ban hanh)) di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((nang xa) OR (lang xa)) hoi. hieu va cam tuc ((ban thanh) OR (ban hanh)) di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly ((nang xa) or (lang xa)) hoi. hieu va cam tuc ((ban thanh) OR (ban hanh)) di su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ly ((nang xa) or (lang xa)) hoi. hieu va cam tuc ((ban thanh) OR (ban hanh)) di su triet*.