Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
vu sach » vu bach, su sach, vu khach
doi cua » dai cua, hoi cua
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
tuc va » thuc va, truc va, duc va
ve cac » va cac, vien cac

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) or (so sach)) ky lang xa hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ky lang xa hoi. hieu ve cac ((tuc va) OR (tuc xa)) hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ky lang xa hoi. hieu ve cac ((tuc va) or (tuc xa)) hanh doi cua tre*.