Perhaps you should try some spelling variations:
phong dung » phuong dung, thong dung, khong dung
dat phong » dai phong, dan phong, chat phong
ho chieu » theo chieu, hoc thieu, mot chieu
van quan » van ban
quan dat » quan sat, qua dat, quan dac
dung dat » dung va, dung tai
dat phan » data phan, dam phan, sat phan

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 (toc thieu)) sang - van quan dat phong dung dat phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) sang - van quan dat phong dung dat phan tu*.