Perhaps you should try some spelling variations:
thieu sang » thieu khang, thieu quang, hieu lang
chieu sang » chieu sach, chieu xanh, hieu lang
trinh toan » tinh toan, thanh toan, trinh han
truong ca » truong cao, trong ca, truong dai
truong va » truong dai, truong cao, truong dao
dung cong » dung trong
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: toc ((thieu sang) or (chieu sang)) - thanh ((truong ca) OR (truong va)) dung cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sang) OR (chieu sang)) - thanh ((truong ca) OR (truong va)) dung cong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sang) or (chieu sang)) - thanh ((truong ca) OR (truong va)) dung cong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sang) or (chieu sang)) - thanh ((truong ca) OR (truong va)) dung cong trinh toan cau*.