Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
thanh tran » thanh trang, thanh toan, thanh tra
quang dung » quang trung, ung dung, cuong dung
phong luan » thong luan, hang luan, phong van
hoc thieu » toc thieu, hoc hien
tong luan » tang luan, dung luan, hang luan

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 hach - thanh tran quang dung ((phong luan) or (tong luan)) van dao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu hach - thanh tran quang dung ((phong luan) OR (tong luan)) van dao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - thanh tran quang dung ((phong luan) or (tong luan)) van dao*.