Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
hieu van » hieu va, thien van, lieu va
sinh cua » manh cua, dinh cuu, sinh va
van cau » van dau, van hau, van chat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
tay hoi » tay ho, tao hoi, tay thai
xay hoi » xa hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
xuc va » duc va, tuc va, luc va
cua te » cua tu

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 dang ((xay hoi) OR (tay hoi)). hieu van cau ((xuc va) or (thuc vat)) hanh sinh cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((xay hoi) OR (tay hoi)). hieu van cau ((xuc va) OR (thuc vat)) hanh sinh cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ((xay hoi) OR (tay hoi)). hieu van cau ((xuc va) or (thuc vat)) hanh sinh cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((xay hoi) OR (tay hoi)). hieu van cau ((xuc va) or (thuc vat)) hanh sinh cua te*.