Perhaps you should try some spelling variations:
luoc dai » cuoc doi, hoc dai, duc dai
cau tren » cu tren, dau tren, ca tren
lang mai » lang dai, lang hai, lang man
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang mai hoi. hieu ve cac ((duc van) or (luoc dai)) hanh vai ((cau tren) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang mai hoi. hieu ve cac ((duc van) OR (luoc dai)) hanh vai ((cau tren) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang mai hoi. hieu ve cac ((duc van) or (luoc dai)) hanh vai ((cau tren) or (cua tre))*.