Perhaps you should try some spelling variations:
xach tay » canh tay
nam truc » nam truoc, nam thuc, nam trung
mat hoi » mai hoi, mat troi, luat hoi
sat hoi » sat voi, luat hoi, sach hoi
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
ve nam » he nam, va nam, le nam
vi hoa » voi hoa, vi hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((xach tay) or (sach y)) dang ((mat hoi) OR (sat hoi)). hieu ve nam truc va hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((xach tay) OR (sach y)) dang ((mat hoi) OR (sat hoi)). hieu ve nam truc va hanh vi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((xach tay) or (sach y)) dang ((mat hoi) OR (sat hoi)). hieu ve nam truc va hanh vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: so ((xach tay) or (sach y)) dang ((mat hoi) OR (sat hoi)). hieu ve nam truc va hanh vi hoa viet*.