Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
than cua » nhan cua, thai cua, ban cua
luc ban » duc ban, cuc ban, luc bat
cau luc » cau truc, cau phuc
van cau » van dau, van hau, van chat
tu sach » thu sach, su sach, te sach
van hoi » van hoc, van hoe, van loi
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet

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 (so sach)) ky nang ((van hoi) OR (van hoa)). hieu van cau luc ban thanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky nang ((van hoi) OR (van hoa)). hieu van cau luc ban thanh than cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (so sach)) ky nang ((van hoi) OR (van hoa)). hieu van cau luc ban thanh than cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky nang ((van hoi) OR (van hoa)). hieu van cau luc ban thanh than cua tre*.