Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
chat xuc » chat huu, cam xuc, chao xu
cau tren » cu tren, ca tren, cau treo
anh thai » anh thi, anh tai, nhanh thai
van anh » van thanh, tuan anh, van minh
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
co hoi » co hoc, co loi
o hai » co hai, so hai, o lai

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 ((co hoi) or (o hai)). hieu va chat xuc van anh thai ((cau tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((co hoi) OR (o hai)). hieu va chat xuc van anh thai ((cau tren) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((co hoi) or (o hai)). hieu va chat xuc van anh thai ((cau tren) or (dau tren))*.