Perhaps you should try some spelling variations:
dung truong » duong truong, dung trong, dung trung
tieu sach » chieu sach, dien sach, te sach
nhan dang » phan dang, tran dang
nhan dan » phan dau, gian dan, nhan tai
van dung » van dong, xay dung, tin dung
thpt van » thpt dan, thpt tran, hat van
van chat » cao chat

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 - ((nhan dang) or (nhan dan)) van dung truong thpt van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((nhan dang) OR (nhan dan)) van dung truong thpt van chat.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((nhan dang) or (nhan dan)) van dung truong thpt van chat*.