Perhaps you should try some spelling variations:
thang long » thanh cong
hieu sang » chieu sang, hieu lang, hieu quang
long manh » luong manh, long banh, duong manh
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc 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: doc hieu sang - hanh ((trinh luat) or (tinh chat)) thang long manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - hanh ((trinh luat) OR (tinh chat)) thang long manh toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - hanh ((trinh luat) or (tinh chat)) thang long manh toan ban*.