Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
phan cau » phan cac, phan lap, toan cau
phan dau » 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 trinh va nhung cong tac ((((phan cau) or (phan dau))) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh trinh va nhung cong tac ((((phan cau) OR (phan dau))) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh trinh va nhung cong tac ((((phan cau) or (phan dau))) or (phan tu))*.