Perhaps you should try some spelling variations:
thong quang » thong quan, thong qua, luong quang
canh trong » anh trong, hanh trong, lanh trong
trong phat » trong thuat, trong nha, trong hoat
dung thong » dung thuong, dung trong, dong thong
quang than » quang thanh, quang thang, quang tuan
hieu tinh » chieu tinh, lieu tinh, hieu binh
kieu tinh » lieu tinh, trieu tinh, diep tinh
phat dung » hat dung, pham dung, phan dung
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu tinh) or (kieu tinh)) - canh trong phat dung thong quang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (kieu tinh)) - canh trong phat dung thong quang than cau*.