Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hang vai » hang va, hang tai, hang hai
luat ban » luat bao, luat dan, luat bat
lua ban » luan ban, cua ban, qua ban
vai cua » dai cua, hai cua, lai cua
qua cay » cua cay, qua cac, qua ca
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ((ma hoi) or (ma hoa)). hieu qua cay ((lua ban) OR (luat ban)) hang vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((ma hoi) OR (ma hoa)). hieu qua cay ((lua ban) OR (luat ban)) hang vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((ma hoi) or (ma hoa)). hieu qua cay ((lua ban) OR (luat ban)) hang vai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((ma hoi) or (ma hoa)). hieu qua cay ((lua ban) OR (luat ban)) hang vai cua te*.