Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nhanh ha » thanh hoa, thanh hai, khanh hoa
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, duc va
ha cua » hoa cua, hai cua, nha cua

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