Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dai » thanh hai, thanh tai, thanh dat
sach vuc » sach duoc, sach nuoc, sach truc
vu sach » vu bach, su sach, vu khach
tang ho » tang cho, tung ho, tang ha
nang co » nang cao, nang doc, nang noi
hieu va » lieu va, hieu qua
cac cac » cac cach, ca cac, cac bac
cac van » cac dan
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach vuc ((tang ho) or (nang co)) hoi. hieu va cac cac van thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach vuc ((tang ho) OR (nang co)) hoi. hieu va cac cac van thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach vuc ((tang ho) or (nang co)) hoi. hieu va cac cac van thanh dai cua tre*.