Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham duy » pham duc
tinh doi » trinh doc, trinh do, tinh hoc
xach tay » canh tay
tinh di » trinh di, tinh da, tin di
duy may » duy mai, dung may, duy thay
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve pham » vi pham, v pham, ve phan

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 tu) or (xach tay)) nang xa hoi. hieu ve pham duy may ((tinh di) OR (tinh doi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (xach tay)) nang xa hoi. hieu ve pham duy may ((tinh di) OR (tinh doi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) or (xach tay)) nang xa hoi. hieu ve pham duy may ((tinh di) OR (tinh doi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (xach tay)) nang xa hoi. hieu ve pham duy may ((tinh di) OR (tinh doi)) cua triet*.