Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
thanh loi » thanh hoa, thanh hai, thanh lap
toc sach » hoc sach, doc sach, thuoc sach
van pham » san pham, van phan, van phat
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
duc gia » quoc gia
ty hang » ly hang, ty xang, thi hang
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty hang ((ma hoi) OR (xa hoi)). hieu van pham duc gia thanh loi ((dung tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty hang ((ma hoi) OR (xa hoi)). hieu van pham duc gia thanh loi ((dung tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty hang ((ma hoi) OR (xa hoi)). hieu van pham duc gia thanh loi ((dung tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty hang ((ma hoi) OR (xa hoi)). hieu van pham duc gia thanh loi ((dung tren) or (cuu tre))*.