Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan
hanh tai » thanh tai, hang tai, han tai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
su cac » tu cac, su cao, su can
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang xa hoi. hieu ve cac ((thuc dan) OR (thuc vat)) hanh tai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang xa hoi. hieu ve cac ((thuc dan) OR (thuc vat)) hanh tai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang xa hoi. hieu ve cac ((thuc dan) OR (thuc vat)) hanh tai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su cac ky nang xa hoi. hieu ve cac ((thuc dan) OR (thuc vat)) hanh tai ((cua tre) or (cuu tre))*.