Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
nhung cong » thong cong, hang cong, nhung don
hieu tinh » chieu tinh, lieu tinh, kieu tinh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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 tinh - ((hanh trang) OR (hanh trinh)) cua ((nhung cong) or (dung cong)) dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - ((hanh trang) OR (hanh trinh)) cua ((nhung cong) OR (dung cong)) dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu tinh - ((hanh trang) OR (hanh trinh)) cua ((nhung cong) or (dung cong)) dan than ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - ((hanh trang) OR (hanh trinh)) cua ((nhung cong) or (dung cong)) dan than ban*.