Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
thang tinh » thanh tinh, thang binh, thong tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
doi hieu » doi chieu, doc hieu, doi hien
toan ban » van ban
luat » luan, xuat

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 - hanh ((trinh luat) or (tranh cua)) cang thang tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh ((trinh luat) OR (tranh cua)) cang thang tinh toan ban*.