Perhaps you should try some spelling variations:
van trinh » van thinh, van tinh, dan trinh
cua viet » ca viet, hoa viet, cua vat
trinh ly » trinh ky, trinh do, trinh tu
toc sach » hoc sach, doc sach, thuoc sach
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, ma hoa, me hoi
ve cau » ke cau, va cau, ve cac
ly cua » le cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) y nang ((ma hoi) or (xa hoi)). hieu ve cau luc van trinh ly cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang ((ma hoi) OR (xa hoi)). hieu ve cau luc van trinh ly cua viet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y nang ((ma hoi) or (xa hoi)). hieu ve cau luc van trinh ly cua viet*.