Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
thang thu » thong thu, thang tu, thanh thu
dang cong » dung cong
thu dang » thu hang, thu bang, thu dong
cong tan » cong tac, cong san, cong thanh
tan dan » tang dan, tan doan, ban dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) or (hieu lang)) - nhanh thang thu dang cong tan dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu lang)) - nhanh thang thu dang cong tan dan ca*.