Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
hieu van » hieu va, thien van, lieu va
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
sach ky » sach y, sach kem, sach hay
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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 ky) OR (sac ky))) or (sach ty)) nang xa hoi. hieu van cau truc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sac ky))) OR (sach ty)) nang xa hoi. hieu van cau truc va hanh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach ky) OR (sac ky))) or (sach ty)) nang xa hoi. hieu van cau truc va hanh hai cua tre*".