Perhaps you should try some spelling variations:
truong thanh » truong trung, truong thpt, truong chung
dung truong » duong truong, dung trong, dung trung
chieu sach » chinh sach, chiet tach, chieu sang
tieu sach » dien sach, te sach, viet sach
thanh ban » thanh san, thanh van, thanh bac
mang van » dang van, tang van, mang va
lang van » dang van, tang van, hoang van
ban can » ban dan, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((tieu sach) or (chieu sach)) - hanh ((mang van) OR (lang van)) dung truong thanh ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sach) OR (chieu sach)) - hanh ((mang van) OR (lang van)) dung truong thanh ban can.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sach) or (chieu sach)) - hanh ((mang van) OR (lang van)) dung truong thanh ban can".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sach) or (chieu sach)) - hanh ((mang van) OR (lang van)) dung truong thanh ban can*.