Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
tong cong » trong cong, cong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
tan toan » tan tran, tap toan, van toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - hanh trinh quang ((nhung cong) or (tong cong)) ((tan toan) or (van ban)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hanh trinh quang ((nhung cong) OR (tong cong)) ((tan toan) OR (van ban)) cau.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh trinh quang ((nhung cong) or (tong cong)) ((tan toan) or (van ban)) cau*.