Perhaps you should try some spelling variations:
hieu van » thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
bao xuc » bao luc, bao thuc
va hanh » van hanh, va thanh, va danh
su viet » so viet
xuc va » duc va, tuc va, luc va

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