Perhaps you should try some spelling variations:
va vanh » va van, va danh, va hanh
tai cao » thai cao, tao cao, tai sao
tai cac » tai cuc
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
cao tuc » dao tuc, cao duc, cao suc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
va cao » va cac, va co, va dao
tuc va » thuc va, truc va, tuc xa

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 nang xa hoi. hieu va cao tuc va vanh ((((tai cau) OR (tai cac))) OR (tai cao)) trieu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu va cao tuc va vanh ((((tai cau) OR (tai cac))) or (tai cao)) trieu~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu va cao tuc va vanh ((((tai cau) OR (tai cac))) or (tai cao)) trieu*.