Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky sang mai hoi. hieu ((ve cham) or (ve cac)) duc va hanh vi ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky sang mai hoi. hieu ((ve cham) OR (ve cac)) duc va hanh vi ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky sang mai hoi. hieu ((ve cham) or (ve cac)) duc va hanh vi ((cuu tre) or (cua tre))*.