Perhaps you should try some spelling variations:
danh lien » danh kien, danh dien, doanh tien
khoa hoc » hoa hoc
te sach » toc sach
cua tre » cua te, cua triet, dua tren
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach _ lang xa hoi. ((hieu ve) or (hieu va)) khoa hoc va danh lien ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ lang xa hoi. ((hieu ve) OR (hieu va)) khoa hoc va danh lien ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach _ lang xa hoi. ((hieu ve) or (hieu va)) khoa hoc va danh lien ((cua tre) or (cuu tre))*.