Perhaps you should try some spelling variations:
phat chong » phap chong, chat chong, pham chuong
chong hoc » chung hoc, chong doc, thong hoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
hoc phat » hoc phan, hoc pho
nhan tai » hang tai, van tai, toan tai
tu mach » tu cach, tu manh, tu hach
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma
tinh » dinh, minh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien ((cuu (tinh OR trinh)) or (cuu cong)) hoc phat chong hoc xa hoi va nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien ((cuu (tinh OR trinh)) OR (cuu cong)) hoc phat chong hoc xa hoi va nhan tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien ((cuu (tinh OR trinh)) or (cuu cong)) hoc phat chong hoc xa hoi va nhan tai".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien ((cuu (tinh OR trinh)) or (cuu cong)) hoc phat chong hoc xa hoi va nhan tai*.