Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh hai » thanh hai, nhanh hai, hang hai
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (thuat sach)) ky ((nang xa) or (lang xa)) hoi. hieu ve am thuc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (thuat sach)) ky ((nang xa) OR (lang xa)) hoi. hieu ve am thuc va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuat sach)) ky ((nang xa) or (lang xa)) hoi. hieu ve am thuc va hanh hai cua tre*.