Perhaps you should try some spelling variations:
thien nang » thien dang, trien nang, thien cong
thien bang » khien bang, thien ban, thien dang
cau treo » cau theo, cau tren, cau triet
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
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 ((thien nang) OR (thien bang)) xa hoi. hieu ve cam xuc va hanh vi ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thien nang) OR (thien bang)) xa hoi. hieu ve cam xuc va hanh vi ((cua tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thien nang) OR (thien bang)) xa hoi. hieu ve cam xuc va hanh vi ((cua tre) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thien nang) OR (thien bang)) xa hoi. hieu ve cam xuc va hanh vi ((cua tre) or (cau treo))*.