Perhaps you should try some spelling variations:
thuc gia » thuc giai, thue gia, thuc dia
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

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