Perhaps you should try some spelling variations:
nhanh ha » thanh hoa, thanh hai, khanh hoa
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
truc va » thuc va, thuc vat, trung va
cuu tre » cua tre, cau tren, cau treo
co hoi » co hoc, co loi
y nang » ky nang, ly nang, may nang
tuc va » thuc va, tuc xa, duc va
v nang » va nang, vu nang, van nang
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 ((y nang) or (v nang)) co hoi. hieu van ban ((tuc va) OR (truc va)) nhanh ha cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) co hoi. hieu van ban ((tuc va) OR (truc va)) nhanh ha cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (v nang)) co hoi. hieu van ban ((tuc va) OR (truc va)) nhanh ha cuu tre*".