Perhaps you should try some spelling variations:
hanh cat » hanh cac, hanh luat, nhanh cay
su sach » so sach
cat cua » chat cua, ca cua, mat cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
cao hoi » cau hoi, co hoi, cao hoc
vu sach » vu bach, vu khach
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ky nang cao hoi. hieu ((ve cam) or (ve cac)) luc va hanh cat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang cao hoi. hieu ((ve cam) OR (ve cac)) luc va hanh cat cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang cao hoi. hieu ((ve cam) or (ve cac)) luc va hanh cat cua tre*.