Perhaps you should try some spelling variations:
thuc cay » thuc can, thuc cao, thuc xay
thuc day » thuc dan, thuc vat
su sach » so sach, vu sach
cao hoi » co hoi, cao hoc, tao hoi
va tham » van tham, va cham, va thanh
van dai » vanh dai, van dao, van hai
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang ((cao hoi) or (cau hoi)). lieu va tham ((thuc cay) or (thuc day)) van dai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang ((cao hoi) OR (cau hoi)). lieu va tham ((thuc cay) OR (thuc day)) van dai cua su.
• Adding a wildcard symbol may retrieve word variants: su sach v nang ((cao hoi) or (cau hoi)). lieu va tham ((thuc cay) or (thuc day)) van dai cua su*.