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
dang cong » dung cong
van dang » van dong, van dung, van nang
cong san » cong tac
phan van » pham van, thanh van, luan van
phan dau » phan tu, hang dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh trinh van dang cong san ((phan van) OR (phan dau))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh trinh van dang cong san ((phan van) or (phan dau))*.