Perhaps you should try some spelling variations:
lang khi » bang khi, lang phi, dang khoi
ban lang » ban hang, ba lang, ban dang
cay phoi » cap phoi, cay cho, gap phoi
su sach » so sach
khi cua » chi cua, thai cua
dua ban » dia ban, cua ban, qua ban
cam dua » ca dua, cay dua, chay dua
hieu ve » hieu va, hieu van
tay hoi » tay ho, tao hoi, tay thai
ky dang » ky nang, ky danh
vu sach » vu bach, vu khach
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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 dang ((cay phoi) or (tay hoi)). hieu ve cam dua ban lang khi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky dang ((cay phoi) OR (tay hoi)). hieu ve cam dua ban lang khi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky dang ((cay phoi) or (tay hoi)). hieu ve cam dua ban lang khi cua tre*.