Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
cau tren » cu tren, dau tren, ca tren
dang xa » dang xay, lang xa, dang ha
qua nam » quan nam, qua nhat, qua cham
cua nam » cua tam, cua ngan, cua nhan
y dang » ky dang, 2 dang, _ dang
tuc va » thuc va, truc va, tuc xa
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y dang xa hoi. hieu ((((qua nam) OR (cua nam))) or (quang nam)) tuc va thanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y dang xa hoi. hieu ((((qua nam) OR (cua nam))) OR (quang nam)) tuc va thanh vi cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y dang xa hoi. hieu ((((qua nam) OR (cua nam))) or (quang nam)) tuc va thanh vi cau tren".
• Adding a wildcard symbol may retrieve word variants: hoc sach y dang xa hoi. hieu ((((qua nam) OR (cua nam))) or (quang nam)) tuc va thanh vi cau tren*.