Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
thang ca » thang cua, hang ca, tang ca
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
hieu ca » hieu cac, hieu cua, hieu va
ca dang » cao dang, cua dang, cac dang
phan ba » phan bo, phan dau, phan lap

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

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