Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
qua cam » qua cham, qua cac, qua ca
xuc van » xuc ban, thuc van, chuc van
duc van » duc va, duc tan, duc manh
luc van » luoc van, luu van, luc va
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu qua cam ((((xuc van) OR (duc van))) or (luc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu qua cam ((((xuc van) OR (duc van))) OR (luc van)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu qua cam ((((xuc van) OR (duc van))) or (luc van)) hanh vi cua tre*".