Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
thue tinh » thuy tinh
thanh van » thanh san, thanh toan, thanh phan
thu tich » chu tich, chu thich, thuy tinh
cong hoa » dong hoa, dong hoc, hang hoa
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
va thanh » gia thanh, ban thanh, va tinh
ma hoi » mai hoi, 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 tich) or (thue tinh)) hoc tap, nghien cua cong hoa dan khoa hoc ma hoi va thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu tich) OR (thue tinh)) hoc tap, nghien cua cong hoa dan khoa hoc ma hoi va thanh van.
• Adding a wildcard symbol may retrieve word variants: ((thu tich) or (thue tinh)) hoc tap, nghien cua cong hoa dan khoa hoc ma hoi va thanh van*.