Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hoc hieu » hoc thieu, doc hieu, hoc dieu
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap
ky dung » ky dang, ky vung, y dung
ly dung » ly dong, xay dung, ly khung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (hoc hien)) nganh - canh trinh ((ky dung) OR (ly dung)) cong dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc hien)) nganh - canh trinh ((ky dung) OR (ly dung)) cong dan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (hoc hien)) nganh - canh trinh ((ky dung) OR (ly dung)) cong dan phan cac".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) nganh - canh trinh ((ky dung) OR (ly dung)) cong dan phan cac*.