Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh lai » tinh lao, tinh hai, minh lai
tu sach » thu sach, su sach, tu cach
cac duc » cac du, cao duc, cac dac
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
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 (te sach)) ty nang xa hoi. hieu ve cac duc va tinh lai ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang xa hoi. hieu ve cac duc va tinh lai ((cua triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang xa hoi. hieu ve cac duc va tinh lai ((cua triet) or (cuu tre))*.