Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
hieu va » hieu qua
dan dai » dat dai, can dai, dan dat
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi
toi xa » thoi xa, toi la, toi da

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 dang ha hoi. ((hieu va) or (lieu va)) cac ((toi xa) or (thi xa)) dan dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang ha hoi. ((hieu va) OR (lieu va)) cac ((toi xa) OR (thi xa)) dan dai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang ha hoi. ((hieu va) or (lieu va)) cac ((toi xa) or (thi xa)) dan dai cua tre*.