Perhaps you should try some spelling variations:
tieu hanh » dieu hanh, tiem hanh, tien hanh
hanh tang » hanh trang, anh tang, hanh mang
luan nang » luan van, van nang
thanh hai » thanh phan, thanh san
thanh hoa » thanh pho
luan san » luan van, luan hoan, luan phan
song san » cong san, dong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu hanh - hanh tang ((luan nang) or (luan san)) song san ((thanh hai) or (thanh hoa))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu hanh - hanh tang ((luan nang) OR (luan san)) song san ((thanh hai) OR (thanh hoa)).
• Adding a wildcard symbol may retrieve word variants: theo tieu hanh - hanh tang ((luan nang) or (luan san)) song san ((thanh hai) or (thanh hoa))*.