Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nhanh khong » nganh khong, nhan khong, nhanh hong
mach hoc » cach hoc, dich hoc, anh hoc
cuu long » cuu cong, cuu tong, cuu nang
thuoc va » thuc va, thuoc ma, thuong va
nang tai » hang tai, tang tai, sang tai
tu mach » tu cach, tu manh, tu hach
long co » dong co, cong co, lang co
va nang » van nang, da nang, cam nang
va hoi » xa hoi, va hoc, va 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 mach hoc tap, nghien cuu long co ((nhanh khong) OR (nhanh chong)) thuoc va hoi va nang tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu long co ((nhanh khong) OR (nhanh chong)) thuoc va hoi va nang tai".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu long co ((nhanh khong) OR (nhanh chong)) thuoc va hoi va nang tai*.