Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu quan » hieu qua, lieu quan, thien quan
dang xay » dang van, van xay
cau tren » dau tren, cau treo, cau tieng
quan cam » quan cau, quan am, quan nam
va hanh » van hanh, va thanh, va danh
ca tren » la tren, co tren, xa tren
cu tren » tu tren, dua tren
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
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: thuoc sach ky dang xay hoi. hieu quan cam xuc va hanh vi ((cau tren) or (((ca tren) OR (cu tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky dang xay hoi. hieu quan cam xuc va hanh vi ((cau tren) OR (((ca tren) OR (cu tren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky dang xay hoi. hieu quan cam xuc va hanh vi ((cau tren) or (((ca tren) OR (cu tren))))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky dang xay hoi. hieu quan cam xuc va hanh vi ((cau tren) or (((ca tren) OR (cu tren))))*.