Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
ban cua » ban quan

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 lang - canh ((tranh cua) OR (ban cua)) tong cong san ((toan tai) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu lang - canh ((tranh cua) OR (ban cua)) tong cong san ((toan tai) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doc hieu lang - canh ((tranh cua) OR (ban cua)) tong cong san ((toan tai) OR (toan ban))*.