Perhaps you should try some spelling variations:
hieu tieng » viet tieng, dien tieng, tiep tieng
hieu vien » hieu viec, thieu nien, nhieu viec
hieu hien » bieu hien, dieu hien, chieu chien
hanh vai » hanh vi, hanh va, hanh tai
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang x ho. ((((hieu vien) OR (hieu tieng))) or (hieu hien)) cac tuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x ho. ((((hieu vien) OR (hieu tieng))) OR (hieu hien)) cac tuc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x ho. ((((hieu vien) OR (hieu tieng))) or (hieu hien)) cac tuc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x ho. ((((hieu vien) OR (hieu tieng))) or (hieu hien)) cac tuc va hanh vai cua tre*.