Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
dinh vai » dinh van, dinh vi, dinh va
vai cau » va cau, van cau, vai cac
va dinh » van dinh, va kinh, va tinh
va cham » va chat, va tham
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
vu cham » vu kham, tu cham, qua cham
loc va » hoc 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 ((ty nang) or (ty hang)) xa hoi. hieu ((vu cham) OR (va cham)) loc va dinh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. hieu ((vu cham) OR (va cham)) loc va dinh vai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ty hang)) xa hoi. hieu ((vu cham) OR (va cham)) loc va dinh vai cau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty hang)) xa hoi. hieu ((vu cham) OR (va cham)) loc va dinh vai cau tren*.