Perhaps you should try some spelling variations:
cay phoi » cap phoi, tay hoi, cay cho
hieu van » hieu va, thien van, lieu va
danh lai » danh sai, gianh lai, dinh lam
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu dang » thu dang, tu dong, su dang
xay hoi » xa hoi, tay hoi, gay thoi
nam duc » nam duoc, pham duc, nam thuc
va danh » va dinh, va dan, va hanh
lai cuu » lai cua, lai chau, lai cuoc
cuu tre » cua tre, cau tren, cau treo

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 dang ((xay hoi) OR (cay phoi)). hieu van nam duc va danh lai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu dang ((xay hoi) OR (cay phoi)). hieu van nam duc va danh lai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu dang ((xay hoi) OR (cay phoi)). hieu van nam duc va danh lai cuu tre*.