Perhaps you should try some spelling variations:
luan phong » luan phuong, xuan phuong, van phong
tieu tang » kieu trang, dieu trang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
thanh lap » thanh san, phan lap, thanh hai
cong tuc » cong thuc, cong tac, cong tu
cong suc » cong thuc, cong suat, cong chuc

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 tang - hanh tang luan phong ((cong tuc) OR (cong suc)) thanh lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu tang - hanh tang luan phong ((cong tuc) OR (cong suc)) thanh lap".
• Adding a wildcard symbol may retrieve word variants: theo tieu tang - hanh tang luan phong ((cong tuc) OR (cong suc)) thanh lap*.