Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh cong » thanh cong
cach hoc » cach thuc, cach thoi, dich hoc
cong hoa » dong hoa, dong hoc, hang hoa
bai toan » bai tap
toan tai » toan tap, doanh tai, toan ban
tu cach » tu cac
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: tu cach hoc tap, nghien thu cong hoa ((nganh cong) or (nhanh chong)) hoc ma hoi bai toan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien thu cong hoa ((nganh cong) OR (nhanh chong)) hoc ma hoi bai toan tai.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien thu cong hoa ((nganh cong) or (nhanh chong)) hoc ma hoi bai toan tai*.