Perhaps you should try some spelling variations:
dinh thai » dinh thi, sinh thai, tinh thai
thai cua » than cua, tai cuc, tri cua
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
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 ((cac ky) or (sach ty)) lang xa hoi. lieu va cac ((xuc van) OR (duc van)) dinh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((cac ky) OR (sach ty)) lang xa hoi. lieu va cac ((xuc van) OR (duc van)) dinh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cac ky) or (sach ty)) lang xa hoi. lieu va cac ((xuc van) OR (duc van)) dinh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((cac ky) or (sach ty)) lang xa hoi. lieu va cac ((xuc van) OR (duc van)) dinh thai cua tre*.