Perhaps you should try some spelling variations:
thien van » thi van
hanh hai » thanh hai, nhanh hai, hang hai
thuc day » thuc dan, thuc vat
truc va » thuc va, thuc vat, trung va
hai cua » thai cua, dai cua, hoi cua
van cau » van dau, van hau, van chat
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
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)) nang xa hoi. thien van cau ((truc va) or (thuc day)) hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. thien van cau ((truc va) OR (thuc day)) hanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang xa hoi. thien van cau ((truc va) or (thuc day)) hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang xa hoi. thien van cau ((truc va) or (thuc day)) hanh hai cua tre*.