Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, chau tuyet
thanh lap » thanh san, phan lap, thanh hai
van thanh » ban thanh, van tuan
cau trieu » cac trieu, cau triet, chua trieu
bo sach » co sach, hoc sach
cao hoi » cau hoi, co hoi, cao hoc
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
va cai » va bai, va dai, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach y nang cao hoi. lieu ((va cai) or (va cac)) duc van thanh lap ((chau triet) or (cau trieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y nang cao hoi. lieu ((va cai) OR (va cac)) duc van thanh lap ((chau triet) OR (cau trieu)).
• Adding a wildcard symbol may retrieve word variants: bo sach y nang cao hoi. lieu ((va cai) or (va cac)) duc van thanh lap ((chau triet) or (cau trieu))*.