Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
tang xa » trang xa, tang ma, tang ha
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cuu tre » cau tren, cau treo
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: su sach thu ((tang xa) or (lang xa)) 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: su sach thu ((tang xa) OR (lang xa)) hoi. hieu va cam xuc va hanh vi ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: su sach thu ((tang xa) or (lang xa)) hoi. hieu va cam xuc va hanh vi ((cuu tre) or (cua tre))*.