Perhaps you should try some spelling variations:
doanh trong » doanh tong, doanh thuong, dinh trong
nghien cua » nghien cuu, nghiep cua, nghiep vua
cong toan » cong tan, cong hoan, cong tuan
trong hoc » truong hoc, tuong hoc, thong hoc
noi thai » noi hai, nguoi thai, nuoc thai
noi thay » noi hay, noi thang, hoi thao
bai toan » bai tap
toan tai » toan tap, doanh tai, toan ban
tu cach » tu cac
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: tu cach ((noi thai) or (noi thay)), nghien cua cong toan doanh trong hoc xa hoi bai toan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach ((noi thai) OR (noi thay)), nghien cua cong toan doanh trong hoc xa hoi bai toan tai.
• Adding a wildcard symbol may retrieve word variants: tu cach ((noi thai) or (noi thay)), nghien cua cong toan doanh trong hoc xa hoi bai toan tai*.