Perhaps you should try some spelling variations:
phuong trong » thuong trong, huong trong, phong trong
chieu sang » chieu sach, chieu xanh, nhieu tang
trong sinh » trong kinh, trong san
hieu lang » hieu quang, nhieu tang, hieu van
dang doan » dang dan, dang don, dang toan
sinh toan » tinh toan, hinh toan, minh toan
anh dang » anh dong, anh dung, anh bang
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu lang)) - anh dang doan phuong trong sinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - anh dang doan phuong trong sinh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - anh dang doan phuong trong sinh toan cau*.