Perhaps you should try some spelling variations:
hanh hang » thanh hang, hang hang, hanh han
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap
chu han » chu van
hang ca » hang va, nang cao, hang tai
ca dang » cao dang, cua dang, cac dang

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 han) or (ho manh)) - hanh hang ca dang ((cong dan) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu han) OR (ho manh)) - hanh hang ca dang ((cong dan) OR (cong san)) than cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chu han) or (ho manh)) - hanh hang ca dang ((cong dan) or (cong san)) than cau*.