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