Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
cao duc » dao duc, cao suc, giao duc
cam duc » cam xuc, pham duc, nam duoc
cua tre » cua te, cuu tre, cua triet
sach ly » sach y, sach lo, sach ty
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa

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 ly ((nang xa) or (lang xa)) hoi. lieu va ((cam duc) OR (cao duc)) va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((nang xa) OR (lang xa)) hoi. lieu va ((cam duc) OR (cao duc)) va hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((nang xa) or (lang xa)) hoi. lieu va ((cam duc) OR (cao duc)) va hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ly ((nang xa) or (lang xa)) hoi. lieu va ((cam duc) OR (cao duc)) va hanh tai cua tre*.