Perhaps you should try some spelling variations:
khanh thai » nhanh thai, khanh thanh, khanh thuan
van khanh » van thanh, van hanh, van anh
cao tren » ca tren, cau tren, co tren
hieu van » hieu va, thien van, lieu va
thai cao » tai cao, thoai cac, thuat cao
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
co dai » co dan, do dai
o lai » o lao
o hoi » co hoi, o hoc, o hai

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 ((o hoi) or (((o lai) or (co dai)))). hieu van cac xuc van khanh thai cao tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((o hoi) OR (((o lai) OR (co dai)))). hieu van cac xuc van khanh thai cao tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((o hoi) or (((o lai) or (co dai)))). hieu van cac xuc van khanh thai cao tren*.