Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, huong dan, cong tac
cong tan » cong tac, cong san, cong thanh
phan dau » phan tu, hang dau

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

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