Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
truc va » thuc va, thuc vat, trung va
hanh di » hanh vi, hanh de, hang di
sach xa » sach dao, sach nha, sach bai
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
di cua » dai cua, doi cua, de cua
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach tay) or (sach xa)) lang xa hoi. hieu ((ve cau) OR (va cau)) truc va hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tay) OR (sach xa)) lang xa hoi. hieu ((ve cau) OR (va cau)) truc va hanh di cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tay) or (sach xa)) lang xa hoi. hieu ((ve cau) OR (va cau)) truc va hanh di cua tu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tay) or (sach xa)) lang xa hoi. hieu ((ve cau) OR (va cau)) truc va hanh di cua tu*.