Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
dung trung » dung trong, quang trung, dung ung
trung thpt » truong thpt, trung thuc, trung nhat
hoc thieu » toc thieu, hoc hien
phan dang » phan dau, phan cong, nhan dan
gian dan » gian lang
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: hoc thieu sach - ((phan dang) or (gian dan)) van dung trung thpt van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((phan dang) OR (gian dan)) van dung trung thpt van chat*.