Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
ca cua » co cua
cua te » cua tu

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 y ((nang xa) or (sang ma)) hoi. hieu va cac duc ((va danh) or (va dinh)) ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (sang ma)) hoi. hieu va cac duc ((va danh) OR (va dinh)) ca cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (sang ma)) hoi. hieu va cac duc ((va danh) or (va dinh)) ca cua te*.