Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
ty nang » ty xang, ly nang, ty nong
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
va kinh » va tinh, qua kinh
kinh va » kinh van, tinh va, sinh va
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
va cuu » va cau, va chu, va huu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((((ty nang) OR (ky nang))) or (ty hang)) xa hoi. hieu ve cam xuc va kinh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((((ty nang) OR (ky nang))) OR (ty hang)) xa hoi. hieu ve cam xuc va kinh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((((ty nang) OR (ky nang))) or (ty hang)) xa hoi. hieu ve cam xuc va kinh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ((((ty nang) OR (ky nang))) or (ty hang)) xa hoi. hieu ve cam xuc va kinh va cuu tre*.