Perhaps you should try some spelling variations:
qua nhan » cua nhan, qua nhat, qua phan
nhan duc » nhan duoc, nhan luc, phan duc
danh doi » danh di, thanh doi, dung doi
dua tren » dung tren
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu qua nhan duc va danh doi ((dua tren) OR (cua te))~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu qua nhan duc va danh doi ((dua tren) or (cua te))*.