Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
dang mam » dang nam, dang mau, dang mat
so sanh » do sanh
thuc va » thuc vat, thuc day
sanh ky » hanh ky, sang ky, nganh ky
hieu ve » hieu va, hieu van
dang ma » dang mau, dang mat, tang ma
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 sanh ky ((dang ma) OR (dang mam)) hoi. hieu ve nam ((thuc va) or (thuc dan)) hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky ((dang ma) OR (dang mam)) hoi. hieu ve nam ((thuc va) OR (thuc dan)) hanh vi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky ((dang ma) OR (dang mam)) hoi. hieu ve nam ((thuc va) or (thuc dan)) hanh vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: so sanh ky ((dang ma) OR (dang mam)) hoi. hieu ve nam ((thuc va) or (thuc dan)) hanh vi hoa viet*.