Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, hieu lang
khung luan » chung luan, dung luan, hang luan
quang phan » quang chan, quang phat, quang thanh
khung cua » chung cua, chung cu, dung cua
vang phan » van phan, nang phan, va phan
ho chieu » theo chieu, hoc thieu, doi chieu

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 sang - manh ((khung cua) OR (khung luan)) thuong cong ((vang phan) or (quang phan)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - manh ((khung cua) OR (khung luan)) thuong cong ((vang phan) OR (quang phan)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - manh ((khung cua) OR (khung luan)) thuong cong ((vang phan) or (quang phan)) tu".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - manh ((khung cua) OR (khung luan)) thuong cong ((vang phan) or (quang phan)) tu*.