Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tan tuan » tran tuan, than tuan, van tuan
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van hoc » van hoa
hoc duc » hoc duoc, hoc nuoc, hoc thuc
tuan di » tuan do, truan doi, quan doi
ma hoi » mai hoi, ma hoa, me hoi
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu

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: te sach ky nang ((ma hoi) OR (xa hoi)). hieu van hoc duc tan tuan di cua tu~.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) or (xa hoi)). hieu van hoc duc tan tuan di cua tu*.