Perhaps you should try some spelling variations:
sach nay » sach hay, sach vay, sach nang
sach tay » xach tay, sach hay, sach tai
trung va » truong va, trang va, trung ha
va hanh » van hanh, va thanh, va danh
lang xa » lang ha, dang xay, lang van
vi cua » vai cua, di cua
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac
cua te » cua tu

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