Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
xuc van » vuc van, xuc ban, thuc van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang cao hoi. hieu ve cam ((((xuc van) OR (luc van))) or (duc van)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang cao hoi. hieu ve cam ((((xuc van) OR (luc van))) OR (duc van)) anh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang cao hoi. hieu ve cam ((((xuc van) OR (luc van))) or (duc van)) anh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang cao hoi. hieu ve cam ((((xuc van) OR (luc van))) or (duc van)) anh vi cua tre*.