Perhaps you should try some spelling variations:
nganh hanh » nganh thanh, nhanh thanh, ngan hang
luc nganh » luc ngan, chuc nganh, luat nganh
su sach » so sach, vu sach
la tren » loai tren, dua tren, dat tren
cau luc » cau truc, cau phuc
sach ty » sach y, sach tu, sach thu
cu tren » tu tren, dua tren
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
ca hoi » cua hoi, xa hoi, co hoi
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: su sach ty hang ((ca hoi) or (cau hoi)). hieu va cau luc nganh hanh vi ((la tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty hang ((ca hoi) OR (cau hoi)). hieu va cau luc nganh hanh vi ((la tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: su sach ty hang ((ca hoi) or (cau hoi)). hieu va cau luc nganh hanh vi ((la tren) or (cu tren))*.