Perhaps you should try some spelling variations:
ban tinh » ban thanh, quan tinh, bi tinh
ban hanh » ban hang
tu sach » thu sach, su sach, tu cach
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac cua » cach cua, cac qua, ca cua
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
vi cuu » vi luu, vinh cuu

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) or (te sach)) ky lang xa hoi. hieu ve cac cua ((ban tinh) or (ban hanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang xa hoi. hieu ve cac cua ((ban tinh) OR (ban hanh)) vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang xa hoi. hieu ve cac cua ((ban tinh) or (ban hanh)) vi cuu tre*.