Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve 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: tu sach ty nang xa hoi. hieu ((ve cac) or (va cac)) ly va hanh tai ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((ve cac) OR (va cac)) ly va hanh tai ((cuu tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((ve cac) or (va cac)) ly va hanh tai ((cuu tre) or (su triet))*.