Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
tai cua » thai cua, tai cuc, tri cua
cam luc » cau luc
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lang xa » dang xay, lang van
lang ha » long ha
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: su sach ky ((lang xa) OR (lang ha)) hoi. hieu va ((cam luc) or (cam xuc)) va thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang xa) OR (lang ha)) hoi. hieu va ((cam luc) OR (cam xuc)) va thanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang xa) OR (lang ha)) hoi. hieu va ((cam luc) or (cam xuc)) va thanh tai cua tre*".