Perhaps you should try some spelling variations:
dien sach » dien anh
trong van » trong cac
van thanh » ban thanh, van tuan
thanh cau » thanh chau, thanh mau, nhanh cau
vat dung » van dung, viet dung, mat duong
do dien » doi dien, co dien, o dien
va dung » van dung, va duong, va ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: do dien sach - ((thanh tung) or (thanh cong)) ((va dung) OR (vat dung)) trong van thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: do dien sach - ((thanh tung) OR (thanh cong)) ((va dung) OR (vat dung)) trong van thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "do dien sach - ((thanh tung) or (thanh cong)) ((va dung) OR (vat dung)) trong van thanh cau".
• Adding a wildcard symbol may retrieve word variants: do dien sach - ((thanh tung) or (thanh cong)) ((va dung) OR (vat dung)) trong van thanh cau*.