Perhaps you should try some spelling variations:
tran khoa » toan khoa, san khoa, nhan khoa
tinh hoc » sinh hoc, tin hoc, hinh hoc
hoc tran » hoc tan, hoc tren, boc tran
khoa hoc » hoa hoc
tu tinh » tru tinh, tu tin, thue tinh
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
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: tu tinh hoc tap, nghien cuu mon hoc tran khoa hoc ma hoi va ((phat va) or (phap va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tinh hoc tap, nghien cuu mon hoc tran khoa hoc ma hoi va ((phat va) OR (phap va)).
• Adding a wildcard symbol may retrieve word variants: tu tinh hoc tap, nghien cuu mon hoc tran khoa hoc ma hoi va ((phat va) or (phap va))*.