Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
nhieu tang » chieu sang, nhiet nang
dong thanh » truong thanh
hieu lang » chieu sang, hieu quang, hieu van
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
dong anh » hong anh, hoang anh, dong kinh
luan han » luan hoan, luan phan, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) OR (nhieu tang)) - hanh trung cua nhung ((dong anh) or (dong thanh)) luan han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (nhieu tang)) - hanh trung cua nhung ((dong anh) OR (dong thanh)) luan han.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) OR (nhieu tang)) - hanh trung cua nhung ((dong anh) or (dong thanh)) luan han".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) OR (nhieu tang)) - hanh trung cua nhung ((dong anh) or (dong thanh)) luan han*.