Perhaps you should try some spelling variations:
pham duy » pham duc
sach thu » sach thue, sach thieu, sach tham
su triet » su tien, ve triet
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
duy van » duy vat, dung van
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su viet » so viet

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