Perhaps you should try some spelling variations:
luc ngan » luc nganh, luc nhan, luat ngan
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cau luc » cau truc, cau phuc
hang li » hang loi, hang ly, fang li
ca tren » cau tren, cu tren, la tren
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho
o hai » co hai, so hai, o lai
li ca » ly ca

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) OR (su sach)) ky nang ((x hoi) or (o hai)). lieu va cau luc ngan hang li ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((x hoi) OR (o hai)). lieu va cau luc ngan hang li ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky nang ((x hoi) or (o hai)). lieu va cau luc ngan hang li ca tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky nang ((x hoi) or (o hai)). lieu va cau luc ngan hang li ca tren*.