Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tu sach » thu sach, su sach, te sach
cau luc » cau truc, cau phuc
nang xa » lang xa, nang ma, mang xa
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
cua te » cua tu
ve cau » ke cau, va cau, ve cac

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 (thuoc sach)) ky ((nang xa) or (nang x)) hoi. hieu ve cau luc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky ((nang xa) OR (nang x)) hoi. hieu ve cau luc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ky ((nang xa) or (nang x)) hoi. hieu ve cau luc va hanh vi cua te*.