Perhaps you should try some spelling variations:
so triet » su triet, so thiet, bo triet
pham duy » pham duc
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
sach ty » sach thu, xach tay, sach hay
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
sach tu » sach thu, cach tu, sach uu
duy van » duy vat, dung van
hai so » dai so, tai so, thai son

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) OR (sach tu))) or (sach y)) nang xa hoi. hieu ve pham duy van hanh hai so triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ty) OR (sach tu))) OR (sach y)) nang xa hoi. hieu ve pham duy van hanh hai so triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach ty) OR (sach tu))) or (sach y)) nang xa hoi. hieu ve pham duy van hanh hai so triet*".