Perhaps you should try some spelling variations:
san khoa » toan khoa, hang khoa, da khoa
hoc giao » hoc cao
tin hoc » sinh hoc
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc san » hoc dan, toc san, hoc can
hoc tai » hoc dai, hoc bai, hoc giai
khoa va » khoan va, khoa ma, hoa va
va phan » van phan, va phat, va phap
phan va » phan van, nhan va, han va
tu tin » thu tin, tu tieng, tru tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tin hoc tap, nghien cuu mon hoc san khoa ((hoc tai) or (hoc giao)) khoa va phan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tin hoc tap, nghien cuu mon hoc san khoa ((hoc tai) OR (hoc giao)) khoa va phan va.
• Adding a wildcard symbol may retrieve word variants: tu tin hoc tap, nghien cuu mon hoc san khoa ((hoc tai) or (hoc giao)) khoa va phan va*.