Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
chinh can » chinh ca, chinh cau, chinh ngan
chinh ban » chinh bao, chinh ngan, chinh luan
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hien) or (hoc thieu)) xanh - hanh tranh cua nhung cong san ((chinh can) OR (chinh ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (hoc thieu)) xanh - hanh tranh cua nhung cong san ((chinh can) OR (chinh ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (hoc thieu)) xanh - hanh tranh cua nhung cong san ((chinh can) OR (chinh ban))".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (hoc thieu)) xanh - hanh tranh cua nhung cong san ((chinh can) OR (chinh ban))*.