Perhaps you should try some spelling variations:
yen lang » den lang, ten lang, yen giang
thanh va » thanh van, hanh va, thanh ha
te sach » toc sach
cam luc » cam xuc, cau luc
luc gia » luoc gia, duc gia, quoc gia
hieu va » lieu va, hieu qua
van hoc » van hoa
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
o lang » hoa lang, hoi lang

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 ((yen lang) or (o lang)) van hoc. hieu va cam luc gia ((hanh vi) or (thanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((yen lang) OR (o lang)) van hoc. hieu va cam luc gia ((hanh vi) OR (thanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((yen lang) or (o lang)) van hoc. hieu va cam luc gia ((hanh vi) or (thanh va)) cuu tre*.