Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
cong tac » cong ty
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - nhanh ((mang cua) OR (dung cua)) cong cong tac ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - nhanh ((mang cua) OR (dung cua)) cong cong tac ((toan cao) OR (van ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - nhanh ((mang cua) OR (dung cua)) cong cong tac ((toan cao) or (van ban))*".