Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
chuan ha » chuan he, quan ha, xuan ha
chuan bi » chuan he

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 - hanh trinh cua ((cong cong) OR (dung cong)) ngang ((chuan ha) OR (chuan bi))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh trinh cua ((cong cong) OR (dung cong)) ngang ((chuan ha) or (chuan bi))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh cua ((cong cong) OR (dung cong)) ngang ((chuan ha) or (chuan bi))*.