Perhaps you should try some spelling variations:
nhanh khong » nhanh chong, nganh khong, nhan khong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu long » cuu cong, cuu tong, cuu nang
co nhanh » co thanh, co hanh, co phanh
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan tai » hang tai, van tai
toan tai » toan tap, doanh tai, toan ban
tu mach » tu cach, tu manh, tu hach
long co » dong co, cong co, lang co

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 long co nhanh khong thuoc xa hoi va ((nhan tai) OR (toan tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu long co nhanh khong thuoc xa hoi va ((nhan tai) OR (toan tai))".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu long co nhanh khong thuoc xa hoi va ((nhan tai) OR (toan tai))*.