Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
hien sach » kien sach, thien hach, chieu sach
dien sach » dien anh
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
tran van » luan van
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) or (dien sach)) - hanh tran van ((nhung tuong) or (dung cong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (dien sach)) - hanh tran van ((nhung tuong) OR (dung cong)) dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) or (dien sach)) - hanh tran van ((nhung tuong) or (dung cong)) dan toan tap*.