Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
cham tinh » chau tinh, cham binh, ha tinh
cua nhung » va nhung
hoc cham » toc cham, hoc chat, hoc chan
tung cua » trung cua, tuong cua, dung cua
doan van » doan va, hoang van, luan van
dan van » dang van, dao van, tan 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 cham tinh - thanh tung cua nhung cong ((dan van) or (doan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc cham tinh - thanh tung cua nhung cong ((dan van) OR (doan van)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc cham tinh - thanh tung cua nhung cong ((dan van) or (doan van)) ban*.