Perhaps you should try some spelling variations:
truong phuong » truong chung, truong trung, dung phuong
chiet tach » chieu sach
phuong dan » phuong danh, phuong doan, huong dan
hoc chiet » hoc thiet, hoc nhiet, hoc hien
doanh cua » doanh luan
trung cua » truong cua, trung tuan, trung cap
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh ((doanh cua) or (trung cua)) truong phuong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh ((doanh cua) OR (trung cua)) truong phuong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh ((doanh cua) or (trung cua)) truong phuong dan van ban*.