Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va doanh » van doanh, vay doanh, va danh
van cua » vang cua, ban cua, dan cua
va dinh » van dinh, va kinh, va tinh
ban tuc » ban tu, ban tum, ban thuoc
sach ty » sach y, sach tu, sach thu
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi

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 ty nang ((ma hoi) OR (mai hoi)). hieu van ban tuc ((va doanh) or (va dinh)) van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((ma hoi) OR (mai hoi)). hieu van ban tuc ((va doanh) OR (va dinh)) van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((ma hoi) OR (mai hoi)). hieu van ban tuc ((va doanh) or (va dinh)) van cua tre*".