Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh tri » thanh tri, hanh tai, hanh trinh
thuc dan » thuc hanh, hoc dan, thuc vat
thuc day » thuc vat
so sinh » so sanh, so tinh, cho sinh
tang ma » mang may, tang van
va nham » va cham, va tham, va nha
thuc va » thuc vat
sinh y » sinh ly
ma hoi » mai hoi, xa hoi, ma hoa
y tang » ky tang, 6 tang, 7 tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sinh y tang ma hoi. lieu va nham ((((thuc va) OR (thuc day))) or (thuc dan)) hanh tri cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sinh y tang ma hoi. lieu va nham ((((thuc va) OR (thuc day))) OR (thuc dan)) hanh tri cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sinh y tang ma hoi. lieu va nham ((((thuc va) OR (thuc day))) or (thuc dan)) hanh tri cua viet*".