Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
chuan chau » chuan chat, chuan ha, chua chay
tieu sang » chieu sang, tieu dung, tiem nang
cong phap » chong phap, cong phan, cong pham
cong van » cong vang, cong san, cong tan
song van » hoang van, trong van, duong van

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 sang - thanh cong phap thong ((cong van) or (song van)) chuan chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - thanh cong phap thong ((cong van) OR (song van)) chuan chau*.