Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
gian cua » gian xu, ban cua
lang van » dang van, tang van, hoang van
vu sach » vu bach, su sach, vu khach
cac luc » cau luc, coc luc, cac nuoc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
van hoc » van hoa
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky lang van hoc. hieu ve cac luc ((le thanh) or (ban thanh)) ((va cua) or (gian cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky lang van hoc. hieu ve cac luc ((le thanh) OR (ban thanh)) ((va cua) OR (gian cua)) tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky lang van hoc. hieu ve cac luc ((le thanh) or (ban thanh)) ((va cua) or (gian cua)) tre*.