Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hoc chieu » hoc thieu, hoc hien, hoc dieu
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
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: ((hoc chieu) or (ho chieu)) xanh - canh trinh va ((hang cong) OR (dang cong)) san than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (ho chieu)) xanh - canh trinh va ((hang cong) OR (dang cong)) san than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (ho chieu)) xanh - canh trinh va ((hang cong) OR (dang cong)) san than cap".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (ho chieu)) xanh - canh trinh va ((hang cong) OR (dang cong)) san than cap*.