Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
thuat cao » thuat co, thuat bao, thuat cam
hoc doanh » hoa doanh, hoc danh, hoc dan
doanh hoc » danh hoc, doanh khoa, doanh hoan
cac nhan » ca nhan, cac nha, cam nhan
nhan van » nhan dan, nhan va, phan van
cao hoc » co hoc, cho hoc, chat hoc
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
mai hoi » mai khoi, dai hoi, lai hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat cao hoc tap, nghien cuu mot hoc doanh doanh hoc ((mai hoi) or (xa hoi)) cac nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat cao hoc tap, nghien cuu mot hoc doanh doanh hoc ((mai hoi) OR (xa hoi)) cac nhan van.
• Adding a wildcard symbol may retrieve word variants: thuat cao hoc tap, nghien cuu mot hoc doanh doanh hoc ((mai hoi) or (xa hoi)) cac nhan van*.