Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, su sach, vu khach
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) ky nang xa hoi. hieu van cam ((xuc va) OR (luc va)) thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ky nang xa hoi. hieu van cam ((xuc va) OR (luc va)) thanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (so sach)) ky nang xa hoi. hieu van cam ((xuc va) OR (luc va)) thanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ky nang xa hoi. hieu van cam ((xuc va) OR (luc va)) thanh ve cua tre*.