Perhaps you should try some spelling variations:
dong trong » duong trong, dung trong, cong trong
chieu sang » chieu sach, chieu xanh, nhieu tang
trong manh » trong minh, trong anh, trong mach
hieu lang » hieu quang, nhieu tang, hieu van
quang qua » quang cua, quang tuan, quang xuan
qua dong » quan dong, qua duong, qua song
manh van » anh van, menh van, canh 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 lang)) - tinh quang qua dong trong manh van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu sang) OR (hieu lang)) - tinh quang qua dong trong manh van ban*".