Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
hanh bi » hanh vi, thanh bai, khanh bui
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty xang xa hoi. ((hieu va) OR (hieu qua)) cam tu va hanh bi dau tieng~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty xang xa hoi. ((hieu va) OR (hieu qua)) cam tu va hanh bi dau tieng".
• Adding a wildcard symbol may retrieve word variants: te sach ty xang xa hoi. ((hieu va) OR (hieu qua)) cam tu va hanh bi dau tieng*.