Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
dang xay » dang van, van xay
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
tang xa » trang xa, tang ma, lang xa
cua tre » cua te, cua triet, dua tren
va cam » va cham, va cac, va cao
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 ((tang xa) or (dang xay)) hoi. hieu va cam xuc va hanh vi ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((tang xa) OR (dang xay)) hoi. hieu va cam xuc va hanh vi ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((tang xa) or (dang xay)) hoi. hieu va cam xuc va hanh vi ((cuu tre) or (cua tre))*.