Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh lap » dinh lam, trinh lap, dinh lang
tinh lap » trinh lap, tinh lao, tich lap
sang tao » hang tai
tao khoi » tao hoi, thao khoa, lao khoa
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
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: ((te sach) or (toc sach)) ky sang tao khoi. hieu ve pham duc va ((tinh lap) OR (dinh lap)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky sang tao khoi. hieu ve pham duc va ((tinh lap) OR (dinh lap)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky sang tao khoi. hieu ve pham duc va ((tinh lap) OR (dinh lap)) cua te*".