Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sach » chinh sach, chiet tach, chieu sang
tieu sang » chieu sang, tieu dung, tiem nang
tranh ha » thanh ha, trang ha, tranh va
trinh ha » trinh han, trinh hoa, trinh nha
cong sat » cong suat, cong san, cong hat
sat phan » sat nhan, vat phan, xuat phan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sang) OR (chieu sach)) - canh ((tranh ha) OR (trinh ha)) thong cong sat phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sang) or (chieu sach)) - canh ((tranh ha) OR (trinh ha)) thong cong sat phan tu~".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sang) or (chieu sach)) - canh ((tranh ha) OR (trinh ha)) thong cong sat phan tu*.