Perhaps you should try some spelling variations:
nganh cong » nhanh chong
hoan thanh » hoang thanh, ban thanh, van thanh
hoc nganh » hoc nhanh
cong thai » cong hai, hong thai, cong thanh
cong khi » khong khi, co khi, cong ha
su hoan » su han, vu hoan, thu hoan
su hoc » tu hoc, du hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su hoc nganh cong khi đong luc ) or ( su hoan thanh cong thai đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su hoc nganh cong khi đong luc ) OR ( su hoan thanh cong thai đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( su hoc nganh cong khi đong luc ) or ( su hoan thanh cong thai đong luc ))*.