Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
chua tre » chua tri, cua tre, chua trieu
te sach » toc sach
hieu ve » hieu va, hieu van
xuc gia » duc gia, tuc gia, quoc gia
luc gia » luoc gia, duc gia, quoc gia
va chua » vua chua, ca chua, va chu
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, 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 y nang ((x hoi) OR (x ho)). hieu ve cam ((xuc gia) or (luc gia)) thanh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((x hoi) OR (x ho)). hieu ve cam ((xuc gia) OR (luc gia)) thanh va chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((x hoi) OR (x ho)). hieu ve cam ((xuc gia) or (luc gia)) thanh va chua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((x hoi) OR (x ho)). hieu ve cam ((xuc gia) or (luc gia)) thanh va chua tre*.