Perhaps you should try some spelling variations:
phan duc » phan tu, phan dau, tran duc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va tinh » may tinh
ve cua » le cua, te cua, ve cum
de cua » le cua, te cua, dieu cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. hieu ve ((phan duc) or (pham duc)) va tinh ((ve cua) or (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve ((phan duc) OR (pham duc)) va tinh ((ve cua) OR (de cua)) te.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ve ((phan duc) or (pham duc)) va tinh ((ve cua) or (de cua)) te*.