Perhaps you should try some spelling variations:
thanh mang » thanh hang, nhanh mang, thanh hoang
hieu sach » chieu sach, hieu cach, dien sach
hanh mang » nhanh mang, hanh trang, nhanh lang
va phuong » va thuong, cac phuong
doc hieu » toc thieu, hoc thieu, hoc hien
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: doc hieu sach - ((hanh mang) or (thanh mang)) ((va phuong) or (he thong)) cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - ((hanh mang) OR (thanh mang)) ((va phuong) OR (he thong)) cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - ((hanh mang) or (thanh mang)) ((va phuong) or (he thong)) cong tac toan tap*.