Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
chieu sang » chieu sach, chieu xanh, hieu lang
luong khoa » dung khoa
thong than » thong thanh, thong phan, thong nhan
luong cao » luong cac, luong dao, luong cho
than phan » thanh phan, toan phan, thanh pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: mot chieu sang - thanh ((luong cao) or (luong khoa)) khong thong than phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot chieu sang - thanh ((luong cao) OR (luong khoa)) khong thong than phan tu.
• Adding a wildcard symbol may retrieve word variants: mot chieu sang - thanh ((luong cao) or (luong khoa)) khong thong than phan tu*.