Perhaps you should try some spelling variations:
nhanh cay » nhanh ha, nhanh bac, nhanh va
cau treo » cau theo, cau tren, cau triet
va nhanh » va thanh, va hanh, va nhan
hieu cua » hieu qua, dieu cua, bieu cua
cuu tre » cua tre, cau tren
tu sach » thu sach, su sach, te sach
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
cac tuc » cac toc, cac tu, cac tac
tuc va » thuc va, truc va, tuc xa

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 y ((nang ma) or (tang ma)) hoi. hieu cua cac tuc va nhanh cay ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (tang ma)) hoi. hieu cua cac tuc va nhanh cay ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang ma) or (tang ma)) hoi. hieu cua cac tuc va nhanh cay ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) or (tang ma)) hoi. hieu cua cac tuc va nhanh cay ((cuu tre) OR (cau treo))*.