Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
tinh tai » trinh tai, tinh thai, tinh hai
cuu tre » cua tre, cau tren, cau treo
va tinh » may tinh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cac toc » cac toi, cac nuoc, cac thoi
cua te » cua tu
toc va » hoc va, toc ta, tuc va
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (sach ty)) nang cau hoi. hieu ve cac toc va tinh tai ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sach ty)) nang cau hoi. hieu ve cac toc va tinh tai ((cua te) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sach ty)) nang cau hoi. hieu ve cac toc va tinh tai ((cua te) or (cuu tre))*.