Perhaps you should try some spelling variations:
thien van » thi van
hanh tai » thanh tai, hang tai, han tai
truc va » thuc vat, trung va
tai cua » thai cua, tai cuc, tri cua
thuc va » thuc vat, thuc dan, thuc day
van cau » van dau, van hau, van chat
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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 (sach y)) nang xa hoi. thien van cau ((truc va) OR (thuc va)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang xa hoi. thien van cau ((truc va) OR (thuc va)) hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang xa hoi. thien van cau ((truc va) OR (thuc va)) hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang xa hoi. thien van cau ((truc va) OR (thuc va)) hanh tai cua tre*.