Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
trinh xay » trinh ky
hoc hieu » hoc hien, doc hieu, hoc dieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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 thieu)) nganh - canh trinh xay dung ((cong dan) OR (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) nganh - canh trinh xay dung ((cong dan) OR (cong tan)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (hoc thieu)) nganh - canh trinh xay dung ((cong dan) OR (cong tan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc thieu)) nganh - canh trinh xay dung ((cong dan) OR (cong tan)) phan cau*.