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
san chinh » lan chinh, van chinh, hanh chinh
ban chinh » lan chinh, van chinh, hanh chinh

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) OR (ban chinh)) can~.
• 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) OR (ban chinh)) can.
• 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) OR (ban chinh)) can".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (hoc thieu)) xanh - hanh tranh cua nhung cong ((san chinh) OR (ban chinh)) can*.