Perhaps you should try some spelling variations:
tiep trong » bien trong, nghiep trong
hieu hien » bieu hien, dieu hien, chieu chien
hieu vien » hieu viec, thieu nien, hieu tieng
cac thuc » cach thuc, cac thu, can thuc
tu sach » thu sach, su sach, te sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang x ho. ((((hieu vien) or (tiep trong))) or (hieu hien)) cac thuc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x ho. ((((hieu vien) OR (tiep trong))) OR (hieu hien)) cac thuc va danh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x ho. ((((hieu vien) or (tiep trong))) or (hieu hien)) cac thuc va danh vi cua tre*.