Perhaps you should try some spelling variations:
hang vai » hang va, hang tai, hang hai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
vai cua » dai cua, hai cua, lai cua
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. lieu ((va cam) OR (va cao)) ((duc ban) OR (duc van)) hang vai cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. lieu ((va cam) or (va cao)) ((duc ban) OR (duc van)) hang vai cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. lieu ((va cam) or (va cao)) ((duc ban) OR (duc van)) hang vai cua vat*.