Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
toan khoan » toan khoa, toan phan, toan hoat
tao khoang » tao zhang
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cap » truong cao, trung tam
cap trong » cay trong, ca trong, cad trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chieu sang)) - thanh trung cap trong cong ((toan khoan) or (tao khoang)) cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sang)) - thanh trung cap trong cong ((toan khoan) OR (tao khoang)) cam.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - thanh trung cap trong cong ((toan khoan) or (tao khoang)) cam*.