Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
hieu vien » hieu hien, hieu viec, thieu nien
van thanh » ban thanh, van tuan
cua tre » cua te, cua triet, dua tren
duc van » duc va, duc tan, duc manh
vien da » vien dai, hien dai
sach ky » sac ky, sach ty, sach kem
nang ro » nang co, nang ho, nang ra
cuu tre » cau tren, cau treo
da duc » dao duc, da duoc, do duc
ro hai » co hai, o hai, so hai

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) or (sach y)) nang ro hai. hieu vien da duc van thanh thai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang ro hai. hieu vien da duc van thanh thai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) nang ro hai. hieu vien da duc van thanh thai ((cua tre) OR (cuu tre))*".