Perhaps you should try some spelling variations:
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
va hanh » van hanh, va thanh, va danh
tu van » tu va
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

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