Perhaps you should try some spelling variations:
cac truc » cau truc, cac tru, cac trung
truc ban » thuc ban, truc dan, truc van
tay lang » tai lang, tay tang, tay quang
ban hanh » ban hang
cua tre » cua te, cua triet, dua tren
hanh ve » hanh vi, hanh va, hanh kem
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
te sai » te tai, te bai, te lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ((tay lang) or (ky nang)) xa hoi. hieu ve cac truc ban hanh ve ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ((tay lang) OR (ky nang)) xa hoi. hieu ve cac truc ban hanh ve ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sai ((tay lang) or (ky nang)) xa hoi. hieu ve cac truc ban hanh ve ((cua tre) or (cuu tre))*.