Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
truong cua » truong ca, truong quan, truong cao
hieu lang » chieu sang, nhieu tang, hieu van
tran xuan » tran quang, tran van
thong san » thong sang, trong san, thong van
san thanh » ban thanh, van thanh, son thanh
thanh cau » thanh chau, thanh mau, nhanh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi ((hieu lang) OR (hieu quang)) - thanh ((truong cua) or (tran xuan)) thong thong san thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((hieu lang) OR (hieu quang)) - thanh ((truong cua) OR (tran xuan)) thong thong san thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi ((hieu lang) OR (hieu quang)) - thanh ((truong cua) or (tran xuan)) thong thong san thanh cau".
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) OR (hieu quang)) - thanh ((truong cua) or (tran xuan)) thong thong san thanh cau*.