Perhaps you should try some spelling variations:
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoc danh » hoc dan, hoc anh, hoc nganh
hoc hanh » hoc nhanh, hoc thanh, hoc anh
khoa hoc » hoa hoc
bai toan » bai tap
toan tai » toan tap, doanh tai, toan ban
ve dich » va dich, van dich
cuu mot » cua mot, cuu mo, huu mot
hoi bai » hoc bai, hoi tai, khoi bay
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: ve dich hoc tap, nghien cuu mot ((hoc danh) or (hoc hanh)) khoa hoc ma hoi bai toan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ve dich hoc tap, nghien cuu mot ((hoc danh) OR (hoc hanh)) khoa hoc ma hoi bai toan tai.
• Adding a wildcard symbol may retrieve word variants: ve dich hoc tap, nghien cuu mot ((hoc danh) or (hoc hanh)) khoa hoc ma hoi bai toan tai*.