Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu lang » chieu sang, hieu lang, chi lang
nhanh dung » nhanh dong, hanh dung, nhanh hung
khong cong » thong cong, chong cong, khong con
khong cang » thong cong, hong bang, khong dung
dung cua » dung luan, dung cho
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu lang - nhanh dung cua ((khong cong) OR (khong cang)) tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu lang - nhanh dung cua ((khong cong) OR (khong cang)) tac toan ban".
• Adding a wildcard symbol may retrieve word variants: theo chieu lang - nhanh dung cua ((khong cong) OR (khong cang)) tac toan ban*.