Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
tu sach » thu sach, su sach, te sach
vai cuu » vai cua
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
cuu tre » cua tre, cau tren, cau treo
ty hang » ly hang, ty xang, thi hang
ly nang » ky nang, ly hang, ly vang
va cam » va cham, va cao, va cai

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 ((ly nang) or (ty hang)) xa hoi. hieu ((va cam) OR (va cac)) truc va danh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (ty hang)) xa hoi. hieu ((va cam) OR (va cac)) truc va danh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly nang) or (ty hang)) xa hoi. hieu ((va cam) OR (va cac)) truc va danh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly nang) or (ty hang)) xa hoi. hieu ((va cam) OR (va cac)) truc va danh vai cuu tre*.