Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh thuc » trinh tu, trinh thi
hoc khien » hoc hien, hoc nghien, hoc vien
hoc thieu » toc thieu, hoc hien
thuc dang » thuoc dang, thuc dan, thuc dung
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc khien) or (hoc thieu)) tinh - hanh trinh thuc dang cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc khien) OR (hoc thieu)) tinh - hanh trinh thuc dang cong dan than tap*.