Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
cau xuc » cam xuc, cau luc, cau truc
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
va cau » van cau, va cac, va dau
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

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 thu ((xang xa) or (mang may)) hoi. hieu va cau xuc va hanh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((xang xa) OR (mang may)) hoi. hieu va cau xuc va hanh vi ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: su sach thu ((xang xa) or (mang may)) hoi. hieu va cau xuc va hanh vi ((cua te) or (cua tu))*.