Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
trung ban » trong ban, trung van, trung can
ban hanh » ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
cua tre » cua te, cuu tre, cua triet
hanh te » hanh tu, hanh ve, hanh de
danh xa » danh ca, dinh xa, canh xa
ky danh » ky anh, ky dang
bo sach » co sach
va cau » van cau, va cac, va dau
te cua » tue cua, le cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu bach) or (((bo sach) or (hoc sach)))) ky danh xa hoi. lieu va cau trung ban hanh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (((bo sach) OR (hoc sach)))) ky danh xa hoi. lieu va cau trung ban hanh te cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (((bo sach) or (hoc sach)))) ky danh xa hoi. lieu va cau trung ban hanh te cua tre*.