Perhaps you should try some spelling variations:
khang cong » hang cong, thanh cong, dang cong
hanh trang » thanh trung, canh tranh, hanh trinh
trang van » tran van, trang va, trong van
van khang » van khanh, van thanh, van quang
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong san » cong tac
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 chu sach - hanh trang van khang cong san ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hanh trang van khang cong san ((toan ban) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hanh trang van khang cong san ((toan ban) or (toan tap))*.