Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
danh vi » hanh vi, dinh vi, danh di
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va
y nang » ky nang, ly nang, v nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
cua te » cua tu

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 cao hoi. ((hieu ve) or (hieu van)) cac ((xuc va) OR (tuc va)) danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoi. ((hieu ve) OR (hieu van)) cac ((xuc va) OR (tuc va)) danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang cao hoi. ((hieu ve) or (hieu van)) cac ((xuc va) OR (tuc va)) danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach y nang cao hoi. ((hieu ve) or (hieu van)) cac ((xuc va) OR (tuc va)) danh vi cua te*.