Perhaps you should try some spelling variations:
nganh dong » nganh cong, nhanh dong, nganh nong
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
dong hoc » dong co, dong luc
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc
hoa van » hoa dan, hoang van, hoa phan
hoa va » hoa xa, hoa vo, hoa vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach hoc tap, nghien cuu mon hoc nganh dong hoc ma ((hoa va) OR (hoa van)) pham van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghien cuu mon hoc nganh dong hoc ma ((hoa va) OR (hoa van)) pham van".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu mon hoc nganh dong hoc ma ((hoa va) OR (hoa van)) pham van*.