Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
duong thanh » dong thanh, muong thanh, luong thanh
thieu hach » thien hach, hieu cach, thieu cac
chieu sach » chinh sach, chiet tach, chieu sang
tranh cua » doanh cua, manh cua
cua nhung » va nhung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu hach) OR (chieu sach)) - canh tranh cua nhung ((duong thanh) or (truong thanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu hach) OR (chieu sach)) - canh tranh cua nhung ((duong thanh) OR (truong thanh)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu hach) OR (chieu sach)) - canh tranh cua nhung ((duong thanh) or (truong thanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu hach) OR (chieu sach)) - canh tranh cua nhung ((duong thanh) or (truong thanh)) van ban*.