Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
bang xa » lang xa, bang va, mang xa
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
di cua » doi cua, de cua, do cua

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 thu) OR (sach thue)) bang xa hoi. hieu ve cac xuc va dan ((di cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thu) OR (sach thue)) bang xa hoi. hieu ve cac xuc va dan ((di cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach thu) OR (sach thue)) bang xa hoi. hieu ve cac xuc va dan ((di cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: so ((sach thu) OR (sach thue)) bang xa hoi. hieu ve cac xuc va dan ((di cua) or (dai cua)) te*.