Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trong thi » trong thoi, trong thu, trong tho
thanh hai » thanh phan, thanh hoa, thanh san
cu trong » chu trong, cau trong, cuc trong
thi minh » chi minh, thi hanh, thi bich
cong cu » chung cu
toan » tran

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - thanh cong cu trong thi minh ((thanh hai) or (tinh toan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh cong cu trong thi minh ((thanh hai) OR (tinh toan)).
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh cong cu trong thi minh ((thanh hai) or (tinh toan))*.