Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
van dung » van dong, xay dung, tin dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan lap

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