Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
danh vai » danh sai, danh va, doanh van
tu sach » su sach, te sach, tu cach
hieu va » hieu qua
vai cuu » vai cua
va danh » va dinh, va dan, va hanh
cau duc » cao duc, cau luc, chu duc
cuu tre » cua tre, cau tren, cau treo
lang xa » lang ha, dang xay, lang van
lo lang » o lang, so lang, le lang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) lo lang xa hoi. ((lieu va) OR (hieu va)) cau duc va danh vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) lo lang xa hoi. ((lieu va) or (hieu va)) cau duc va danh vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) lo lang xa hoi. ((lieu va) or (hieu va)) cau duc va danh vai cuu tre*.