Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
toc sach » hoc sach, doc sach, thuoc sach
tinh lai » tinh lao, tinh hai, minh lai
tu cach » tu cac
va tinh » may tinh
cu tren » tu tren, dua tren
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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 cach) or (toc sach)) ty nang xa hoi. hieu ve cac nuoc va tinh lai ((cua triet) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (toc sach)) ty nang xa hoi. hieu ve cac nuoc va tinh lai ((cua triet) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (toc sach)) ty nang xa hoi. hieu ve cac nuoc va tinh lai ((cua triet) or (cu tren))*.