Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
hanh tai » thanh tai, hang tai, han tai
nang xa » nang x, lang xa, nang ma
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, dua tren, cua thep
cuu tre » cau tren, cau treo
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 xa hoi. hieu vien cac duc va hanh tai ((((cua tre) or (cuu tre))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu vien cac duc va hanh tai ((((cua tre) OR (cuu tre))) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. hieu vien cac duc va hanh tai ((((cua tre) or (cuu tre))) or (cua triet))*.