Perhaps you should try some spelling variations:
van thang » van thanh, van khang, van hang
nuoc sach » nguoi sach, hoc sach, cuoc cach
cau thuc » cau truc, cuu thuc, can thuc
thuc van » thuc vat, thuc dan, thuc va
thang di » hang di, tang di, thang loi
kv nang » ky nang, ki nang, ke nang
hieu ke » hieu kem, chieu ke, hieu ky
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
ke cau » ket cau
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ((v nang) or (kv nang)) xa hoi. hieu ke cau thuc van thang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ((v nang) OR (kv nang)) xa hoi. hieu ke cau thuc van thang di cua tre.
• Adding a wildcard symbol may retrieve word variants: nuoc sach ((v nang) or (kv nang)) xa hoi. hieu ke cau thuc van thang di cua tre*.