Perhaps you should try some spelling variations:
sach ty » sach y, sach thu, xach tay
tai cao » thai cao, tao cao, tai sao
tai cau » tai cac
va vanh » va van, va danh, va hanh
cao tuc » dao tuc, cao duc, cao suc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
tuc va » thuc va, truc va, tuc xa
va cao » va cac, va co, va dao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang xa hoi. hieu va cao tuc va vanh ((tai cau) OR (tai cao)) trieu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) nang xa hoi. hieu va cao tuc va vanh ((tai cau) or (tai cao)) trieu~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) nang xa hoi. hieu va cao tuc va vanh ((tai cau) or (tai cao)) trieu*.