Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
dinh tai » dinh toai, dinh tri, dinh thi
bo sach » co sach, hoc sach
sach ly » sach y, sach lo, sach ty
tai cuu » tai cuc, tai buu, tai cua
va dinh » van dinh, va kinh, va tinh
cuu tre » cua tre, cau tren, cau treo
hang xa » hoang xa, hang ca, lang xa
tuc va » thuc va, truc va, tuc xa
ve cac » va cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ly ((hang xa) or (hang va)) hoi. hieu ((ve cac) OR (vien cac)) tuc va dinh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ly ((hang xa) OR (hang va)) hoi. hieu ((ve cac) OR (vien cac)) tuc va dinh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ly ((hang xa) or (hang va)) hoi. hieu ((ve cac) OR (vien cac)) tuc va dinh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: bo sach ly ((hang xa) or (hang va)) hoi. hieu ((ve cac) OR (vien cac)) tuc va dinh tai cuu tre*.