Perhaps you should try some spelling variations:
thien van » thi van
can thuc » dan thuc, van thuc, cay thuc
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
thuc va » thuc vat, thuc dan, thuc day
va kinh » va tinh, qua kinh
kinh di » kinh do, kinh i, minh di
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) or (cac ky)) nang cao hoi. ((thien van) or (lieu va)) can thuc va kinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (cac ky)) nang cao hoi. ((thien van) OR (lieu va)) can thuc va kinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (cac ky)) nang cao hoi. ((thien van) or (lieu va)) can thuc va kinh di cua tre*.