Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) OR (sach y)) hang xa hoi. hieu va cham ((xuc va) or (thuc va)) thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) hang xa hoi. hieu va cham ((xuc va) OR (thuc va)) thanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach y)) hang xa hoi. hieu va cham ((xuc va) or (thuc va)) thanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach y)) hang xa hoi. hieu va cham ((xuc va) or (thuc va)) thanh va cua tre*.