Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ky sang » ky nang, ky tang, duy sang
ky dang » ky nang, ky danh
lap lai » lap tai, lay lai, lam lai
va pham » van pham, va phat, va phan
va phap » va phat, ban phap
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
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: su sach ((ky sang) or (ky dang)) lap lai. hieu ((va pham) OR (va phap)) duc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky sang) OR (ky dang)) lap lai. hieu ((va pham) OR (va phap)) duc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky sang) or (ky dang)) lap lai. hieu ((va pham) OR (va phap)) duc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky sang) or (ky dang)) lap lai. hieu ((va pham) OR (va phap)) duc va hanh vi cua te*.