Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
cap thuong » chap thuong, cao thuong, cp thuong
thong tinh » thuong tinh, thong tin, thong minh
hieu lang » hieu quang, nhieu tang, hieu van
ca thuong » cao thuong, cua thuong, va thuong
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)) - thanh trung ((cap thuong) OR (ca thuong)) thong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung ((cap thuong) OR (ca thuong)) thong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh trung ((cap thuong) OR (ca thuong)) thong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung ((cap thuong) OR (ca thuong)) thong tinh toan cau*.