Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tranh van » tran van, trinh van, thanh van
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
van dung » van dong, xay dung, tin dung
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 van dung cong trinh ((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 van dung cong trinh ((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 van dung cong trinh ((pham ma) or (pham va))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - canh tranh van dung cong trinh ((pham ma) or (pham va))*.