Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
manh hung » anh huong
dang cong » dung cong
hung cua » huong cua, chung cua, khung cua
cua dang » cua cong, cua ban
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) or (chieu sach)) - manh hung cua dang cong trinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chieu sach)) - manh hung cua dang cong trinh toan ban*.