Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
cuu tre » cau tren, cau treo
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thu) OR (sach thue)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thue)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) OR (sach thue)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) OR (sach thue)) nang xa hoi. hieu ve cam xuc va hanh vi ((cua tre) or (cuu tre))*.