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