Perhaps you should try some spelling variations:
luc trung » duc trung, quoc trung, duc truong
thanh vai » thanh hai, thanh van, thanh tai
luc trong » luoc trong, luu trong, cuc trong
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
vai cuu » vai cua
van bao » van ban, van dao
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
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) or (te sach)) y nang x hoi. hieu van bao ((luc trung) OR (luc trong)) thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang x hoi. hieu van bao ((luc trung) OR (luc trong)) thanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang x hoi. hieu van bao ((luc trung) OR (luc trong)) thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang x hoi. hieu van bao ((luc trung) OR (luc trong)) thanh vai cuu tre*.