Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
tinh hai » tinh thai, tinh chat, trinh han
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
va tinh » may tinh
hai cuu » hai cua, hai chu, hai cuc
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
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: su ((sac ky) or (sach ty)) nang cau hoi. hieu ve cac tuc va tinh hai 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 tuc va tinh hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sach ty)) nang cau hoi. hieu ve cac tuc va tinh hai cuu tre*.