Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
van thanh » ban thanh, van tuan
thanh lai » thanh hai, thanh lap, thanh loi
tu sach » thu sach, su sach, te sach
cao hoi » co hoi, cao hoc, tao hoi
hieu va » lieu va, hieu qua
cau duc » cao duc, cau luc, chu duc
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau

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 y nang ((cao hoi) or (cau hoi)). hieu va cau duc van thanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((cao hoi) OR (cau hoi)). hieu va cau duc van thanh lai chau triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((cao hoi) or (cau hoi)). hieu va cau duc van thanh lai chau triet*.