Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
lang thang » dang thanh, hung thang, lang trong
thong tinh » thuong tinh, thong tin, thong minh
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
doi hieu » doi chieu, doc hieu, doi hien
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - ((lang thang) or (cang thang)) cua thong thong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((lang thang) OR (cang thang)) cua thong thong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((lang thang) or (cang thang)) cua thong thong tinh toan ban*.