Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh tai, hanh van
kha nang » phap nang, ky nang, ki nang
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
ho nang » thi nang, cao nang
ve nam » he nam, va nam, le nam

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 ((ho nang) OR (kha nang)) xa hoi. hieu ve nam thuc va ((hanh vai) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ho nang) OR (kha nang)) xa hoi. hieu ve nam thuc va ((hanh vai) OR (hanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ho nang) OR (kha nang)) xa hoi. hieu ve nam thuc va ((hanh vai) or (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ho nang) OR (kha nang)) xa hoi. hieu ve nam thuc va ((hanh vai) or (hanh va)) cuu tre*.