Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong ty
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 - hanh tang cua nhung ((cong tan) OR (cong thanh)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tang cua nhung ((cong tan) OR (cong thanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang cua nhung ((cong tan) OR (cong thanh)) toan tap*.