Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
tranh va » tranh van, trang va, trinh va
va trong » va truong, va thong, va tuong
pham ma » pham van, pham tai, pham xay
pham va » pham van, pham tai, phan van

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 (hoc thieu)) xanh - canh tranh va trong cong thanh ((pham ma) or (pham va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh tranh va trong cong thanh ((pham ma) OR (pham va)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - canh tranh va trong cong thanh ((pham ma) or (pham va))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - canh tranh va trong cong thanh ((pham ma) or (pham va))*.