Perhaps you should try some spelling variations:
phuong thuc » thuong thuc
chieu xanh » chieu sach, chieu sang, chieu tinh
cong vang » cong lang, cong quang, cong ngang
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
cua bang » chua bang, cua ban, cua dang
cong van » cong san, song van, cong tan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: mot chieu xanh - anh dung cua bang ((cong van) or (cong vang)) phuong thuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot chieu xanh - anh dung cua bang ((cong van) OR (cong vang)) phuong thuc*.