Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
quang phan » quang chan, quang phat, quang thanh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
nang phat » nang suat
chinh ta » chinh tai, chinh va, chinh tri
van phat » va phat, van chat, van phan
ta dung » tac dung, tan dung, tao dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - hanh chinh ta dung cong ((((nang phat) OR (van phat))) or (quang phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh chinh ta dung cong ((((nang phat) OR (van phat))) OR (quang phan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh chinh ta dung cong ((((nang phat) OR (van phat))) or (quang phan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh chinh ta dung cong ((((nang phat) OR (van phat))) or (quang phan)) cau*.