Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
kham chuan » phap chuan
hoc thieu » toc thieu, hoc hien
tranh han » tranh hang, trinh han, tranh ban
cong cong » cong dong, trong cong, dung cong
kham chua » kham pha
han cong » phan cong, hang cong, hanh cong

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 tranh han cong cong ((kham chuan) OR (kham chua)) bi~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh han cong cong ((kham chuan) or (kham chua)) bi*.