Perhaps you should try some spelling variations:
thu tinh » thue tinh, thuy tinh, thuc tinh
tinh hoc » sinh hoc, tin hoc, hinh hoc
hoc hanh » hoc nhanh, hoc thanh, hoc anh
hanh hoa » thanh hoa, khanh hoa, hang hoa
ban soan » bien soan, ban doanh, nang soan
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hai van » thai van, ha van, hai tan
ban san » ban dan, ban can, ban sac
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu tinh hoc tap, nghien cuu mon hoc hanh hoa hoc xa hai van ((ban san) or (ban soan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu tinh hoc tap, nghien cuu mon hoc hanh hoa hoc xa hai van ((ban san) OR (ban soan)).
• Adding a wildcard symbol may retrieve word variants: thu tinh hoc tap, nghien cuu mon hoc hanh hoa hoc xa hai van ((ban san) or (ban soan))*.