Perhaps you should try some spelling variations:
sach thu » sach thue, sach tham, cach thuc
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
xang xa » lang xa, mang xa, ang xa
xuc va » duc va, tuc va, luc 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 thu) OR (sach thieu)) ((xang xa) or (mang may)) hoi. hieu van cau xuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach thieu)) ((xang xa) OR (mang may)) hoi. hieu van cau xuc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thu) OR (sach thieu)) ((xang xa) or (mang may)) hoi. hieu van cau xuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach thu) OR (sach thieu)) ((xang xa) or (mang may)) hoi. hieu van cau xuc va hanh vi cua te*.