Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
ban thanh » ban hanh, ban hang
pham cuu » pham huu, cham cuu, pham cua
thu bang » thu ban, chu bang, thu trang
thu hang » thi hang, thuc hanh, thu huong
va pham » van pham, va phat, va phap
cuu ban » cuu van, cua ban, cuu san
va chu » va che, va chi
va cau » van cau, va cac, va dau

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

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