Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, hinh tai
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
han tai » hang tai, nhan tai, van tai
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
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 lang) or (ky nang)) van hoa. hieu va cac tuc va ((hanh tai) OR (han tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky nang)) van hoa. hieu va cac tuc va ((hanh tai) OR (han tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) or (ky nang)) van hoa. hieu va cac tuc va ((hanh tai) OR (han tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) or (ky nang)) van hoa. hieu va cac tuc va ((hanh tai) OR (han tai)) cua tre*.