Perhaps you should try some spelling variations:
tren khoa » trien khoa, tran khoa, tien khoan
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoc tren » moc tren, hoc truyen, thuoc tren
khoa hoc » hoa hoc
tu dich » te dich, chu dich, hut dich
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
phat va » chat va, pham va, phat vi
phap va » phap vat, pham va, pham van
hoc xa » hoc ma

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

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