Perhaps you should try some spelling variations:
sang tao » hang tai
sach ky » sach y, sach ty, sach kem
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
lai cua » dai cua, hai cua, lai chau
sac ky » cac ky, sai ky
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: hoc ((sach ky) OR (sac ky)) sang tao hoi. hieu ve pham duc ((va tinh) or (may tinh)) lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sac ky)) sang tao hoi. hieu ve pham duc ((va tinh) OR (may tinh)) lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach ky) OR (sac ky)) sang tao hoi. hieu ve pham duc ((va tinh) or (may tinh)) lai cua te".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) OR (sac ky)) sang tao hoi. hieu ve pham duc ((va tinh) or (may tinh)) lai cua te*.