Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
cau duc » cao duc, cau luc, cau truc
chu duc » thu duc, chua duoc, cuu duoc
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
co hoi » co hoc, co loi

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