Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
doanh va » doan va, doanh cua, hanh va
cong san » cong tac
san chay » san pham, van chat, dan chan
chay cau » chay cao, chay chua, cay ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) or (chieu sang)) - canh ((doanh va) OR (doanh tai)) thong cong san chay cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chieu sang)) - canh ((doanh va) OR (doanh tai)) thong cong san chay cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (chieu sang)) - canh ((doanh va) OR (doanh tai)) thong cong san chay cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (chieu sang)) - canh ((doanh va) OR (doanh tai)) thong cong san chay cau*.