Perhaps you should try some spelling variations:
tcvn thinh » tien thinh, tan thinh
hanh tang » hanh trang, anh tang, hanh mang
qua trong » quan trong, qua trinh, qua song
tang qua » tang quan, tang cua, tang quy
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan tap » toan ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tcvn thinh - hanh tang qua trong ((cong dan) OR (cong tan)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: theo tcvn thinh - hanh tang qua trong ((cong dan) OR (cong tan)) toan tap*.