Perhaps you should try some spelling variations:
dong phuong » duong phuong, dong huong, dong thuong
dung phuong » dung thuong, bang phuong, dung chung
thieu sach » chieu sach, thien hach, hieu cach
hanh tran » hanh trang, thanh tran, hanh tram
dinh toan » tinh toan, hinh toan, minh toan
tran van » luan van
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - hanh tran van ((dong phuong) or (dung phuong)) dinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - hanh tran van ((dong phuong) OR (dung phuong)) dinh toan ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - hanh tran van ((dong phuong) or (dung phuong)) dinh toan ban*.