Perhaps you should try some spelling variations:
trinh lap » trinh luat, trinh luan, trinh phap
toc sach » hoc sach, doc sach, thuoc sach
tinh lap » tinh lao, dinh lap, tich lap
hieu voi » hieu moi, lieu voi, hieu loi
sang tao » hang tai
hieu vi » hieu va, hieu ve, hien vi
sach ky » sac ky, sach y, sach ty
tao hoi » tao khoi, tao boi, tay hoi
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: toc sach ky sang tao hoi. ((hieu vi) OR (hieu voi)) pham duc va ((tinh lap) or (trinh lap)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky sang tao hoi. ((hieu vi) OR (hieu voi)) pham duc va ((tinh lap) OR (trinh lap)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky sang tao hoi. ((hieu vi) OR (hieu voi)) pham duc va ((tinh lap) or (trinh lap)) cua te*".