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

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 (ty hang)) xa hoi. hieu ((ve cam) or (va cam)) duc va kinh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty nang) OR (ty hang)) xa hoi. hieu ((ve cam) OR (va cam)) duc va kinh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty nang) or (ty hang)) xa hoi. hieu ((ve cam) or (va cam)) duc va kinh va cuu tre*.