Perhaps you should try some spelling variations:
thanh tung » thanh cong
thuong dan » huong dan, thuong han, thuong dam
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
tuan dung » tuan duong, tran dung, tuan dang
tan dung » tran dung, tin dung, van dung
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (doi chieu)) sach - thanh tung ((tuan dung) OR (tan dung)) thuong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chieu)) sach - thanh tung ((tuan dung) OR (tan dung)) thuong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doi chieu)) sach - thanh tung ((tuan dung) OR (tan dung)) thuong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) sach - thanh tung ((tuan dung) OR (tan dung)) thuong dan than cau*.