Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
tran tuan » tran quang, tran thanh, tranh luan
tran xuan » tran quang, tran van
trong tac » trong cac, trong tan, trong tuc
tuong tac » cong tac, luong tai, tuong lai
toan ban » van ban

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 - thanh ((tran tuan) or (tran xuan)) duong ((trong tac) or (tuong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((tran tuan) OR (tran xuan)) duong ((trong tac) OR (tuong tac)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((tran tuan) or (tran xuan)) duong ((trong tac) or (tuong tac)) toan ban*.