Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
cam thu » nam thu, cac thu, ca thu
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cam tu » nam tu, dam tu, tam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu van ((cam tu) or (cam thu)) va tinh vi ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. hieu van ((cam tu) OR (cam thu)) va tinh vi ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu van ((cam tu) or (cam thu)) va tinh vi ((cua triet) or (va triet))*.