Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
phat duc » pham duc, phan duc, phan duoc
te sach » toc sach
hieu va » lieu va, hieu qua
duc gia » quoc gia
hai cua » thai cua, dai cua, hoi cua
ma hoi » mai hoi, ma hoa, me hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach _ nang ((ma hoi) or (xa hoi)). hieu va phat duc gia thanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ nang ((ma hoi) OR (xa hoi)). hieu va phat duc gia thanh hai cua te.
• Adding a wildcard symbol may retrieve word variants: te sach _ nang ((ma hoi) or (xa hoi)). hieu va phat duc gia thanh hai cua te*.