Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh hang » thanh hang, hanh han, hanh mang
hang hang » nang hang, cang thang, hung thang
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, mot chieu
cua dang » cua cong, cua ban
cong san » cong tac
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (doi chieu)) xanh - ((hanh hang) or (hang hang)) cua dang cong san than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - ((hanh hang) OR (hang hang)) cua dang cong san than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - ((hanh hang) or (hang hang)) cua dang cong san than cap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - ((hanh hang) or (hang hang)) cua dang cong san than cap*.