Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, tien anh
hanh tang » hanh trang, anh tang, hanh mang
cua duong » cua dong, cua huong, tuan duong
qua duong » quan duong, qua dung, qua dong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu xanh) or (dieu hanh)) - hanh tang ((cua duong) OR (qua duong)) cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu xanh) OR (dieu hanh)) - hanh tang ((cua duong) OR (qua duong)) cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu xanh) or (dieu hanh)) - hanh tang ((cua duong) OR (qua duong)) cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu xanh) or (dieu hanh)) - hanh tang ((cua duong) OR (qua duong)) cong dan toan tap*.