Perhaps you should try some spelling variations:
van nhanh » van thanh, van khanh, van nhan
cau tren » cu tren, dau tren, ca tren
thai cau » thai cao, toan cau, thai van
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi
ve cac » va cac, vien cac
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 sac ky nang ((co hoi) or (o hai)). hieu ve cac xuc ((van nhanh) or (van hanh)) thai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((co hoi) OR (o hai)). hieu ve cac xuc ((van nhanh) OR (van hanh)) thai cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((co hoi) or (o hai)). hieu ve cac xuc ((van nhanh) or (van hanh)) thai cau tren*.