Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh hai » thanh phan, thanh hoa, thanh san
hai cua » thai cua, dai cua, hoi cua
sach ky » sac ky, sach y, sach ty
tieu su » thieu so
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
lao va » tao va, cao va, bao va
ma hoi » xa hoi, ma hoa, me hoi
su cam » su nam, su cao, su can
lo va » lo van, ly va, le va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang ((ma hoi) or (mai hoi)). tieu su cam ((lo va) or (lao va)) thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((ma hoi) OR (mai hoi)). tieu su cam ((lo va) OR (lao va)) thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang ((ma hoi) or (mai hoi)). tieu su cam ((lo va) or (lao va)) thanh hai cua tre*.