Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
dong thanh » truong thanh
doi chieu » doc hieu, doi chi, mot chieu
anh quang » anh xquang, anh quan, nhanh quang
tran hung » tran hong, tran hoang, tran huu
cong tan » cong tac, cong san, cong thanh
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: doi chieu sang - anh quang ((tran hung) or (tran quang)) ((dong thanh) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - anh quang ((tran hung) OR (tran quang)) ((dong thanh) OR (cong tan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - anh quang ((tran hung) or (tran quang)) ((dong thanh) or (cong tan)) toan cao*.