Perhaps you should try some spelling variations:
cau tren » cu tren, ca tren, cau treo
dau tren » dau tien, dat tren, dau tieng
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, thuc van
xuc ban » duc ban, cuc ban, quoc ban
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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