Perhaps you should try some spelling variations:
hanh nang » anh nang, ganh nang, hanh mang
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
nang su » dang su, nang du, nang tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - hanh nang su dung cong vang ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - hanh nang su dung cong vang ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh nang su dung cong vang ((toan cau) or (toan cao))*.