Perhaps you should try some spelling variations:
chao truong » cho truong, cac truong, nha truong
hanh trinh » canh tranh, hanh chinh
cao truong » cac truong, cho truong, cau truong
hoc thieu » toc thieu, hoc hien
doc hieu » toc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan

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 (hoc thieu)) tinh - hanh trinh ((chao truong) OR (cao truong)) cong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) tinh - hanh trinh ((chao truong) OR (cao truong)) cong dan phan tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc thieu)) tinh - hanh trinh ((chao truong) OR (cao truong)) cong dan phan tu*".