Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh oai
thanh tai » thanh hai, thanh toan, doanh tai
su sach » so sach, vu sach
de nhan » tue nhan, de thanh, dac nhan
do nhan » doi nhan, do nhat, do phan
cao hoa » cao hoat, cao khoa, cau hoa
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va

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 cao hoa. hieu ((de nhan) OR (do nhan)) luc va ((thanh vai) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoa. hieu ((de nhan) OR (do nhan)) luc va ((thanh vai) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang cao hoa. hieu ((de nhan) OR (do nhan)) luc va ((thanh vai) or (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y nang cao hoa. hieu ((de nhan) OR (do nhan)) luc va ((thanh vai) or (thanh tai)) cua tre*.