Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van chat » cao chat
hieu van » hieu va, thien van, lieu va
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hang di » hang doi, hang vi, hang dien
su sach » so sach, vu sach
ma hoi » xa hoi, ma hoa, me hoi
tuc va » thuc va, truc va, duc va
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((ma hoi) OR (mai hoi)). hieu van chat ((tuc va) OR (tuc xa)) hang di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang ((ma hoi) or (mai hoi)). hieu van chat ((tuc va) OR (tuc xa)) hang di cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((ma hoi) or (mai hoi)). hieu van chat ((tuc va) OR (tuc xa)) hang di cua triet*.