Perhaps you should try some spelling variations:
tinh voi » trinh voi, tinh doi, binh voi
van chat » cao chat
van cau » van dau, van hau, toan cau
voi cua » hoi cua, doi cua, moi cua
xuc may » xuc hay, truc may, phuc may
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang xa) or (sang ma)) hoi. hieu ((van cau) OR (van chat)) xuc may tinh voi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (sang ma)) hoi. hieu ((van cau) OR (van chat)) xuc may tinh voi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (sang ma)) hoi. hieu ((van cau) OR (van chat)) xuc may tinh voi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (sang ma)) hoi. hieu ((van cau) OR (van chat)) xuc may tinh voi cua tre*.