Perhaps you should try some spelling variations:
trong thanh » truong thanh, trung thanh, rong thanh
sang trong » lang trong, mang trong, nang trong
chieu sang » chieu sach, chieu xanh, hieu lang
quang qua » quang cua, quang tuan, quang xuan
thanh van » thanh san, thanh toan, thanh phan
hieu van » hieu va, thien van, lieu va
qua sang » qua song, qua san, bua sang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sang) or (hieu van)) - tinh quang qua sang trong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu van)) - tinh quang qua sang trong thanh van ban*.