Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu hang » thi hang, thuc hanh, thu huong
thai cua » tai cuc, tri cua, dai cua
than cua » nhan cua, ban cua, gian cua
tu sach » thu sach, su sach, te sach
tu hung » tu chung, tu nhung, tu vung
va pham » van pham, va phat, va phap
duc ban » duc tan, duc van, dua ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((tu hung) or (thu hang)) xa hoi. lieu va pham duc ban thanh ((thai cua) OR (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu hung) OR (thu hang)) xa hoi. lieu va pham duc ban thanh ((thai cua) OR (than cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu hung) or (thu hang)) xa hoi. lieu va pham duc ban thanh ((thai cua) OR (than cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu hung) or (thu hang)) xa hoi. lieu va pham duc ban thanh ((thai cua) OR (than cua)) tre*.