Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
trong dam » trong lam, trong nam, trong cac
dam nhung » cam nhung, nam nhung, dam khung
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
khan cap » khan ap, than cap, khoan cam

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 - thanh trong dam nhung cong san ((tri cua) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trong dam nhung cong san ((tri cua) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trong dam nhung cong san ((tri cua) or (khan cap))*.