Perhaps you should try some spelling variations:
nhung cau » chung cu, nhung bai, nhu cau
thu sach » tu sach, thuat sach, thuoc sach
ty nhung » tay nhung, tu nhung, ky nhung
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ve giao » te giao, viet giao, van giao
va hanh » van hanh, va thanh, va danh
va chua » vua chua, ca chua, va chu
va cua » via cua, ca cua, ma cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nhung cau hoi. hieu ve giao duc va hanh ((va cua) or (va chua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nhung cau hoi. hieu ve giao duc va hanh ((va cua) OR (va chua)) te.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nhung cau hoi. hieu ve giao duc va hanh ((va cua) or (va chua)) te*.