Perhaps you should try some spelling variations:
nhan hang » ngan hang, nhan dang, nha hang
dat tren » dat trong, dua tren
dau tren » dau tien, dau tieng, dau trong
luc nhan » luc nhat, cu nhan, tue nhan
sach ty » sach y, sach tu, sach thu
hang di » hang doi, hang vi, hang dien
cau luc » cau truc, cau phuc
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
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 ty ((nang xa) or (lang xa)) hoi. hieu va cau luc nhan hang di ((dau tren) OR (dat tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang xa)) hoi. hieu va cau luc nhan hang di ((dau tren) OR (dat tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (lang xa)) hoi. hieu va cau luc nhan hang di ((dau tren) OR (dat tren))*".