Perhaps you should try some spelling variations:
thong quang » thong quan, thong qua, luong quang
trong thinh » trong tinh, trong kinh, trong sinh
trong thanh » truong thanh, trung thanh, rong thanh
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh thong » anh thong, hanh trong, hang thong
quang dung » quang trung, ung dung, cuong dung
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 xanh) or (chieu sang)) - hanh thong quang dung ((trong thinh) OR (trong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sang)) - hanh thong quang dung ((trong thinh) OR (trong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sang)) - hanh thong quang dung ((trong thinh) OR (trong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sang)) - hanh thong quang dung ((trong thinh) OR (trong thanh)) toan cau*.