Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
qua hai » qua hoat
hai luc » hai cuc, khai luoc, nhan luc
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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 ty xang xa hoi. hieu qua hai luc va hanh ((vi cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. hieu qua hai luc va hanh ((vi cua) OR (lai cua)) tre*.