Perhaps you should try some spelling variations:
trong thpt » truong thpt, trong thuat, trong thiet
doc hieu » hoc thieu, hoc hien
phan dan » phan dang, phan dau, nhan dan
dan dung » van dung, tin dung, ap dung
thpt dan » thuc dan, tho dan
dan phan » doan phan, dan chan, van phan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) sach - phan dan dung trong thpt dan phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sach - phan dan dung trong thpt dan phan lap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sach - phan dan dung trong thpt dan phan lap*.