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
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
tuc va » thuc va, truc va, duc va
ve cac » va cac, vien cac

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)) ty lang xa hoi. hieu ve cac ((tuc va) OR (tuc xa)) danh vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty lang xa hoi. hieu ve cac ((tuc va) OR (tuc xa)) danh vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty lang xa hoi. hieu ve cac ((tuc va) OR (tuc xa)) danh vai cuu tre*.