Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
cuu tre » cau tren, cau treo
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: thu sach y ((nang xa) or (tang ma)) 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: thu sach y ((nang xa) OR (tang ma)) 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: "thu sach y ((nang xa) or (tang ma)) hoi. hieu ve cam xuc va hanh vi ((cua tre) OR (cuu tre))*".