Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nhanh ha » thanh hoa, thanh hai, khanh hoa
va nhanh » va thanh, va hanh, va nhan
van nang » van quang, van ban, van dong
ban tum » ban tu
ban tuc » ban tu, ban thuoc, ban duoc
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
cuu tre » cua tre, cau tren, cau treo
co hoi » co hoc, co loi
ha cuu » ho cuu, cham cuu, khao cuu

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 ((ly nang) or (van nang)) co hoi. hieu van ((ban tuc) OR (ban tum)) va nhanh ha cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (van nang)) co hoi. hieu van ((ban tuc) OR (ban tum)) va nhanh ha cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) or (van nang)) co hoi. hieu van ((ban tuc) OR (ban tum)) va nhanh ha cuu tre*".