Perhaps you should try some spelling variations:
hoach hoc » hoach hoi, hoach hoa, hoa hoc
thanh hoa » thanh pho
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
danh hoa » khanh hoa, nganh hoa, danh cho
dan hang » ban hang, van hang, dat hang
hang tai » hang va, dung tai
hoc xa » hoc ma
xa hoa » xa khoa, xa hoi, ma hoa

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

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