Perhaps you should try some spelling variations:
thanh vinh » thanh binh, thanh tinh, than kinh
hanh vinh » khanh vinh, hanh tinh, anh vinh
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
tuc va » thuc va, truc va, tuc xa
co hoi » co hoc, co loi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang co hoi. hieu va cham ((tuc va) or (thuc vat)) ((hanh vinh) OR (thanh vinh)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang co hoi. hieu va cham ((tuc va) OR (thuc vat)) ((hanh vinh) OR (thanh vinh)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang co hoi. hieu va cham ((tuc va) or (thuc vat)) ((hanh vinh) OR (thanh vinh)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang co hoi. hieu va cham ((tuc va) or (thuc vat)) ((hanh vinh) OR (thanh vinh)) cua tre*.