Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach tao » sach dao, sach bao, sach tai
nang cau » hang cau, nang dau, bang cau
cham cua » chat cua, cham cuu, ham cua
ban hanh » ban hang
vu sach » vu bach, su sach, vu khach
va cham » va chat, va tham
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tao ((nang cau) or (nang cao)) hoi. lieu va cham cua ban hanh va ((cua triet) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tao ((nang cau) OR (nang cao)) hoi. lieu va cham cua ban hanh va ((cua triet) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach tao ((nang cau) or (nang cao)) hoi. lieu va cham cua ban hanh va ((cua triet) or (cua tre))*.