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, dang xay
hieu va » lieu va, hieu qua
ang xa » lang xa, mang xa, dang xay
dac va » duc va, day va, dai va
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 ty ((xang xa) or (ang xa)) hoi. hieu va cac ((dac va) OR (dat va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((xang xa) OR (ang xa)) hoi. hieu va cac ((dac va) OR (dat va)) hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((xang xa) or (ang xa)) hoi. hieu va cac ((dac va) OR (dat va)) hanh vi cua te*".