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

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 anh 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 anh van ban*.