Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
luc ngan » luc nganh, luc nhan, luat ngan
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
hang di » hang doi, hang vi, hang dien
la tren » loai tren, dua tren, dat tren
ve cau » ke cau, va cau, ve cac
di la » di lam, de la, di le

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 van)) hoi. hieu ve cau luc ngan hang di la tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang van)) hoi. hieu ve cau luc ngan hang di la tren*.