Perhaps you should try some spelling variations:
hieu sang » chieu sang, hieu lang, hieu quang
trong dan » trong dang, trong san, trong tan
doc hieu » toc thieu, hoc thieu, hoc hien
quang si » quang soi, quang tri, quang hoi
dan toan » van toan, dan than, manh toan
toan ban » van ban
quan su » quan cua

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 - tinh ((quang si) or (quan su)) dung trong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - tinh ((quang si) OR (quan su)) dung trong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - tinh ((quang si) or (quan su)) dung trong dan toan ban*.