Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
cong ngang » cong nhan, cong quang, cong lang
ngang toan » nganh toan, dang toan, quang toan
dung cong » dung trong
anh nang » ganh nang, anh bang, anh sang
anh dang » anh dong, anh dung, anh bang
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - ((anh nang) or (anh dang)) cua dung cong ngang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((anh nang) OR (anh dang)) cua dung cong ngang toan cao*.