Perhaps you should try some spelling variations:
cao tren » ca tren, cau tren, co tren
cham xuc » chat xuc, cham soc, pham duc
sach ky » sac ky, sach y, sach ty
van anh » van thanh, tuan anh, van minh
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
anh va » hanh va
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x hoi. ((hieu ve) or (hieu va)) ((cham xuc) OR (cam xuc)) van anh va cao tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((hieu ve) OR (hieu va)) ((cham xuc) OR (cam xuc)) van anh va cao tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. ((hieu ve) or (hieu va)) ((cham xuc) OR (cam xuc)) van anh va cao tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu ve) or (hieu va)) ((cham xuc) OR (cam xuc)) van anh va cao tren*.