Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh hoa » thanh hoa, khanh hoa, ninh hoa
cong hoa » dong hoa, dong hoc, hang hoa
danh hoa » thanh hoa, khanh hoa, danh cho
chu nhan » chau nhan, cu nhan, chu han
nhan dan » phan dau, gian dan, nhan tai
te sinh » ve sinh, he sinh, ke sinh
hoi chu » hoi chuc
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sinh hoc tap, nghien thu cong hoa ((danh hoa) or (nganh hoa)) hoc xa hoi chu nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sinh hoc tap, nghien thu cong hoa ((danh hoa) OR (nganh hoa)) hoc xa hoi chu nhan dan.
• Adding a wildcard symbol may retrieve word variants: te sinh hoc tap, nghien thu cong hoa ((danh hoa) or (nganh hoa)) hoc xa hoi chu nhan dan*.