Perhaps you should try some spelling variations:
luc ngan » luc nganh, luc nhan, luat ngan
tu sach » thu sach, su sach, tu cach
hang vi » hang va, hanh vi, hang di
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
lang ha » long ha
lang xa » dang xay, lang van
te sach » toc sach
cu tren » tu tren, dua tren
ve cau » ke cau, va cau, ve cac
vi cu » vi su, vi xu, vi du

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) or (te sach)) ty ((lang xa) OR (lang ha)) hoi. hieu ve cau luc ngan hang vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty ((lang xa) OR (lang ha)) hoi. hieu ve cau luc ngan hang vi cu tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ty ((lang xa) OR (lang ha)) hoi. hieu ve cau luc ngan hang vi cu tren*".