Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh
cua truong » cua trung, xuan truong, cac truong
hoc thieu » toc thieu, hoc hien
vuong dan » huong dan, tuong dan, vuong dao
xuong dan » huong dan, xuong san, tuong dan
thanh cac » hanh cac, thanh bac, thanh ca

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 - ((hanh trinh) or (hanh chinh)) cua truong ((vuong dan) OR (xuong dan)) thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh trinh) OR (hanh chinh)) cua truong ((vuong dan) OR (xuong dan)) thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((hanh trinh) or (hanh chinh)) cua truong ((vuong dan) OR (xuong dan)) thanh cac".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh trinh) or (hanh chinh)) cua truong ((vuong dan) OR (xuong dan)) thanh cac*.