Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
hoc hieu » hoc thieu, hoc hien, doc hieu
cua tong » cua cong, cua dong, cua nong
cong huy » cuong huy, dong huy, cong duy
cong quy » cung quy, cong ty, cong cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - hanh tranh cua tong ((cong huy) OR (cong quy)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - hanh tranh cua tong ((cong huy) OR (cong quy)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh tranh cua tong ((cong huy) OR (cong quy)) van ban*.