Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
nang loi » nang noi, hang loi, tang loi
vu sach » vu bach, su sach, vu khach
duc ban » duc tan, duc van, dua ban
xuc ban » cuc ban, quoc ban, xuat ban
hieu ve » hieu va, hieu van
loi roi » loi noi, lai roi, voi roi
so sach » so sanh, bo sach, co sach
su bien » su kien, su hien, su tien
ve cam » ve cham, ve cac, va cam
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) ky nang loi roi. hieu ve cam ((xuc ban) OR (duc ban)) hanh vai su bien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ky nang loi roi. hieu ve cam ((xuc ban) OR (duc ban)) hanh vai su bien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (so sach)) ky nang loi roi. hieu ve cam ((xuc ban) OR (duc ban)) hanh vai su bien".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ky nang loi roi. hieu ve cam ((xuc ban) OR (duc ban)) hanh vai su bien*.