Perhaps you should try some spelling variations:
loai hoi » lai hoi, ngoai hoi, loai khoa
loai hoc » logic hoc, loai khoa, dai hoc
van dinh » van minh, van dich, va dinh
vu cham » va cham, vu kham, tu cham
va danh » va dinh, va dan, va hanh
ky dang » ky nang, ky danh
hieu vu » hieu va, hieu ve, hieu su
cham xu » chao xu, cham cuu, chat xuc
di cua » dai cua, doi cua, de cua
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky dang ((loai hoi) or (loai hoc)). hieu vu cham xu ((va danh) or (van dinh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky dang ((loai hoi) OR (loai hoc)). hieu vu cham xu ((va danh) OR (van dinh)) di cua te.
• Adding a wildcard symbol may retrieve word variants: tu sai ky dang ((loai hoi) or (loai hoc)). hieu vu cham xu ((va danh) or (van dinh)) di cua te*.