Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vinh cuu » dinh cuu, sinh cua, dinh cu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban
vi cuu » vi luu

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 ky nang xa hoi. hieu van nam ((xuc van) or (xuc ban)) hanh ((vi cuu) OR (vinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van nam ((xuc van) OR (xuc ban)) hanh ((vi cuu) OR (vinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu van nam ((xuc van) or (xuc ban)) hanh ((vi cuu) OR (vinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van nam ((xuc van) or (xuc ban)) hanh ((vi cuu) OR (vinh cuu)) tre*.