Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nhanh dong » hanh dong, anh dong, nhan dang
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
thu day » thuc day, thu da, thu dac
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: toc sach ky lang xa hoi. hieu van nam thu day ((nhanh dong) OR (nhanh chong)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky lang xa hoi. hieu van nam thu day ((nhanh dong) OR (nhanh chong)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. hieu van nam thu day ((nhanh dong) OR (nhanh chong)) cua tre*.