Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
thanh tuong » thanh thuong, thanh tung, thanh huong
thuong con » thuong dong, truong cong, thong cong
hieu lang » chieu sang, hieu quang, nhieu tang
tuong cua » truong cua, huong cua, thong cua
thanh lap » thanh san, phan lap, thanh hai
phan cau » phan dau, phan cac, phan tu
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh tuong cua ((thuong cong) OR (thuong con)) dan ((phan cau) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tuong cua ((thuong cong) OR (thuong con)) dan ((phan cau) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh tuong cua ((thuong cong) OR (thuong con)) dan ((phan cau) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tuong cua ((thuong cong) OR (thuong con)) dan ((phan cau) or (thanh lap))*.