Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh hoa » thanh hoa, khanh hoa, danh hoa
tinh hoc » sinh hoc, tin hoc, hinh hoc
cong hoc » dong hoc, cong hoa, cong coc
bai toan » bai tap
toan tai » toan tap, doanh tai, toan ban
te tinh » tue tinh, tre tinh, ve tinh
hoi bai » hoc bai, hoi tai, khoi bay
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: te tinh hoc tap, nghien thu cong hoc ((nganh hoa) or (danh cho)) hoc xa hoi bai toan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te tinh hoc tap, nghien thu cong hoc ((nganh hoa) OR (danh cho)) hoc xa hoi bai toan tai.
• Adding a wildcard symbol may retrieve word variants: te tinh hoc tap, nghien thu cong hoc ((nganh hoa) or (danh cho)) hoc xa hoi bai toan tai*.