Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
ky lang » ky dang, ky tang, tay lang
ve cau » va cau, ve cac, le cau
ke cau » ket cau
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca 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 sach ((ky lang) or (ky nang)) xa hoi. hieu ((ve cau) or (ke cau)) luc va tinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky lang) OR (ky nang)) xa hoi. hieu ((ve cau) OR (ke cau)) luc va tinh va cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) or (ky nang)) xa hoi. hieu ((ve cau) or (ke cau)) luc va tinh va cua tre*.