Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu quang » thieu quang, hieu quan, hieu qua
nhung cong » dung cong, thong cong, hang cong
hanh dung » thanh dung, anh dung, manh dung
hanh dong » anh dong, ha dong
cua nhung » va nhung
cong nam » dong nam, uong nam, thong nam
nam toan » nam tan, tam toan, nam thanh
toan cau » 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 sang) or (hieu quang)) - ((hanh dung) or (hanh dong)) cua nhung cong nam toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu quang)) - ((hanh dung) OR (hanh dong)) cua nhung cong nam toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu quang)) - ((hanh dung) or (hanh dong)) cua nhung cong nam toan cau*.