Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
so sanh » do sanh
thuc va » thuc vat, thuc day
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
sanh ky » hanh ky, sang ky, nganh ky
vi hoa » voi hoa, vi hoc, va hoa
ve nam » he nam, le nam, te nam
va nam » van nam, ha nam, va nay
ma hoi » mai hoi, xa hoi, ma 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 hoi. hieu ((ve nam) OR (va 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 hoi. hieu ((ve nam) OR (va 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 hoi. hieu ((ve nam) OR (va nam)) ((thuc va) or (thuc dan)) hanh vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: so sanh ky dang ma hoi. hieu ((ve nam) OR (va nam)) ((thuc va) or (thuc dan)) hanh vi hoa viet*.