Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
tang xa » trang xa, tang ma, lang xa
va cai » va cac, va bai, va dai
sach 2 » sach y
ve cac » va cac, vien cac
2 tang » 2 thang, 6 tang, 7 tang
vi cuu » vi luu, vinh cuu

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 2 tang xa hoi. hieu ((va cai) OR (ve cac)) ((thuc dan) OR (thuc vat)) hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach 2 tang xa hoi. hieu ((va cai) or (ve cac)) ((thuc dan) OR (thuc vat)) hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach 2 tang xa hoi. hieu ((va cai) or (ve cac)) ((thuc dan) OR (thuc vat)) hanh vi cuu tre*.