Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
sach nay » sach hay, sach vay, sach nang
dau tren » dau tien, dat tren, dau trong
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
cau xuc » cam xuc, cau luc, cau truc
tu sach » thu sach, su sach, te sach
mang xa » lang xa, dang xay, mang cua
hieu va » lieu va, hieu qua
va cau » van cau, va cac, va dau

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 nay ((mang xa) or (mang may)) hoi. hieu va cau xuc van hanh vi ((dau tren) or (dau tieng))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach nay ((mang xa) OR (mang may)) hoi. hieu va cau xuc van hanh vi ((dau tren) OR (dau tieng)).
• Adding a wildcard symbol may retrieve word variants: tu sach nay ((mang xa) or (mang may)) hoi. hieu va cau xuc van hanh vi ((dau tren) or (dau tieng))*.