Perhaps you should try some spelling variations:
thien dang » thien bang, thien danh, thien nang
trinh tin » trinh kinh, trinh toan, trinh han
dung cong » dung trong
trinh tu » trinh ky, trinh do
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: hoc ((thien dang) or (tieng anh)) - hanh ((trinh tin) OR (trinh tu)) dung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien dang) OR (tieng anh)) - hanh ((trinh tin) OR (trinh tu)) dung cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien dang) or (tieng anh)) - hanh ((trinh tin) OR (trinh tu)) dung cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien dang) or (tieng anh)) - hanh ((trinh tin) OR (trinh tu)) dung cong dan toan tap*.