Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van nang » van quang, van ban, van dong
than cua » nhan cua, thai cua, ban cua
va thanh » gia thanh, ban thanh, va tinh
nang duc » nang luc, nang doc, nang du
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
v nang » va nang, vu nang, voi nang

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 (su sach)) v nang xa hoi. hieu van nang duc va thanh ((vai cua) or (than cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) v nang xa hoi. hieu van nang duc va thanh ((vai cua) OR (than cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) v nang xa hoi. hieu van nang duc va thanh ((vai cua) or (than cua)) tre*".