Perhaps you should try some spelling variations:
phuong hanh » phuong thanh, phuong anh, phuong danh
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
phuong dan » phuong danh, phuong doan, huong dan
doc chieu » doc hieu, doi chieu, toc thieu
toan cao » toan ban, toan tap
va donh » va doanh, va dinh, va dong
va don » va dong, va doc, va do

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc chieu sach - thanh tung ((va don) or (va donh)) ((phuong dan) or (phuong hanh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu sach - thanh tung ((va don) OR (va donh)) ((phuong dan) OR (phuong hanh)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doc chieu sach - thanh tung ((va don) or (va donh)) ((phuong dan) or (phuong hanh)) toan cao*.