Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
su sach » so sach
vu sach » vu bach, vu khach
qua cac » cua cac
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban
y nang » ky nang, ly nang, v nang
vi cau » va cau, ve cau, di cau
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: ((su sach) OR (vu sach)) y nang x hoi. hieu qua cac ((xuc van) or (xuc ban)) hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang x hoi. hieu qua cac ((xuc van) OR (xuc ban)) hanh vi cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) y nang x hoi. hieu qua cac ((xuc van) or (xuc ban)) hanh vi cau tren*".