Perhaps you should try some spelling variations:
mot chieu » doi chieu
hanh tang » hanh trang, hanh mang, hanh tung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
anh tang » anh bang, anh dang, anh nang
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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

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