Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam ngoc » pham ngoc, lam nguoi, lang ngoc
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach
vu sach » vu bach, vu khach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
van lam » van nam
ngoc va » nuoc va, ngoc ha, goc va
va hanh » van hanh, va thanh, va danh
cua cu » cua chu, cua cau, cua su

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 lang xa hoi. hieu van lam ngoc va hanh dai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky lang xa hoi. hieu van lam ngoc va hanh dai cua cu.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky lang xa hoi. hieu van lam ngoc va hanh dai cua cu*.