Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
nang doc » nang luc
hanh vai » hanh vi, hanh tai, hanh van
doc hoi » duoc hoi, hoc hoi, doc hai
qua cac » cua cac
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu bach) or (vu khach)) ky nang doc hoi. hieu qua cac tu va ((hanh vai) OR (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (vu khach)) ky nang doc hoi. hieu qua cac tu va ((hanh vai) OR (hanh va)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu bach) or (vu khach)) ky nang doc hoi. hieu qua cac tu va ((hanh vai) OR (hanh va)) cua tre*".