Perhaps you should try some spelling variations:
nganh dong » nganh cong, nganh nong, nganh khong
nhanh dong » hanh dong, nhanh chong, anh dong
sach hoc » cach hoc, sach hoi, mach hoc
phat van » pham van, phan van, phap van
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
suc ma » suc manh
hoa va » hoa van, hoa xa, hoa vo

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

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