Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
trang ung » trang vuong, trang phung, trang cong
dung cong » dung trong
doc hieu » hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
than tap » han tap, phan tap, than cap
toan tap » toan ban

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