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
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
thuc va » thuc vat, thuc dan, thuc day
di cua » dai cua, doi cua, de cua
vi cua » vai cua
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky

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

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