Perhaps you should try some spelling variations:
luan phan » luan van, luan hoan
van phan » van phong, van thanh, van ban
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
su viet » so viet
ve su » va su

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 nang xa hoi. hieu ((van phan) OR (luan phan)) duc va hanh ve su viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((van phan) OR (luan phan)) duc va hanh ve su viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((van phan) OR (luan phan)) duc va hanh ve su viet*.