Perhaps you should try some spelling variations:
phan duc » pham duc, phan tu, phan dau
doc sach » hoc sach, toc sach, nuoc sach
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
gia cua » gian cua, giau cua, gia cuc
via cua » gian cua, giau cua, rija cua
duc van » duc va, duc tan, duc manh
ve phan » va phan, ke phan, ve phat
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma

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) or (doc sach)) ky nang xa hoi. hieu ve phan duc van hanh ((via cua) OR (gia cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ky nang xa hoi. hieu ve phan duc van hanh ((via cua) OR (gia cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) ky nang xa hoi. hieu ve phan duc van hanh ((via cua) OR (gia cua)) tre*".