Perhaps you should try some spelling variations:
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
han tai » hang tai, van tai, toan tai
luc ban » duc ban, cuc ban, luc bat
cua tuc » cua duc, cua tu, cua thuoc
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
va cau » van cau, va cac, va cao
v nang » va nang, vu nang, van nang
va dau » va dao

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang xa hoi. hieu ((va cau) OR (va dau)) luc ban ((han tai) OR (nhan tai)) cua tuc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang xa hoi. hieu ((va cau) or (va dau)) luc ban ((han tai) OR (nhan tai)) cua tuc~".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang xa hoi. hieu ((va cau) or (va dau)) luc ban ((han tai) OR (nhan tai)) cua tuc*.