Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
truong cao » truong dai
thong cong » trong cong, tong cong, thong thong
trung cap » trung tam
cong san » cong tac
san phan » san pham, van phan, sat phan
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chiet tach)) - manh ((trung cap) or (truong cao)) thong cong san phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - manh ((trung cap) OR (truong cao)) thong cong san phan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - manh ((trung cap) or (truong cao)) thong cong san phan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - manh ((trung cap) or (truong cao)) thong cong san phan tap*.