Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
va thanh » gia thanh, ban thanh, va tinh
than cuu » than cua, thanh luu, thang cua
than cui » than cua, than nui, thanh qui
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
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: su sach y nang xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh ((than cuu) OR (than cui)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. ((hieu van) OR (lieu va)) bac xuc va thanh ((than cuu) OR (than cui)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh ((than cuu) OR (than cui)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh ((than cuu) OR (than cui)) tre*.