Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
than cua » nhan cua, thai cua, ban cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, cay phoi, gay thoi
tay hoi » tay ho, tao hoi, tay thai
van cac » van hac, van cau, van bac
tan anh » tuan anh, tran anh, toan anh
du tan » duc tan, duy tan, du tap

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 ky nang ((xay hoi) OR (tay hoi)). hieu van cac du tan anh ((than cua) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((xay hoi) OR (tay hoi)). hieu van cac du tan anh ((than cua) OR (tai cuc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((xay hoi) OR (tay hoi)). hieu van cac du tan anh ((than cua) or (tai cuc)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((xay hoi) OR (tay hoi)). hieu van cac du tan anh ((than cua) or (tai cuc)) tre*.