Perhaps you should try some spelling variations:
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoc tran » hoc tan, hoc tren, boc tran
tran hoa » tran khoa, tran hoai, tran hoan
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 tran hoa hoc xa hoi va ((phat va) OR (phap va))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dich hoc tap, nghien cuu mon hoc tran hoa 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 tran hoa hoc xa hoi va ((phat va) OR (phap va))*.