Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
gian cua » gian xu, ban cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
thuc va » thuc vat, thuc dan, thuc day
va dan » ca dan, va dao, va dau
x hoi » o hoi, x ho, 5 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 ky nang ((x hoi) or (xa hoi)). ((hieu ve) or (hieu van)) am thuc va dan gian cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (xa hoi)). ((hieu ve) OR (hieu van)) am thuc va dan gian cua vat.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) or (xa hoi)). ((hieu ve) or (hieu van)) am thuc va dan gian cua vat*.