Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan phan » luan van, luan hoan
thong van » trong van, thong va, thong quan
tong van » trong van, tang van, song van
hanh cac » hang cac, hanh cat, nhanh cay

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 xanh - hanh tang luan phan ((tong van) or (thong van)) hanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh tang luan phan ((tong van) OR (thong van)) hanh cac.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang luan phan ((tong van) or (thong van)) hanh cac*.