Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh huy » thanh thuy, thanh huyen, thanh hung
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
sach tu » sach thu, sach ty, sach uu
hanh va » hang va, hanh vi
huy va » hay va, tuy va, thuy van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach tu) or (cach tu)) nang xa hoi. hieu van thanh huy va ((hanh vai) OR (hanh va)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach tu) OR (cach tu)) nang xa hoi. hieu van thanh huy va ((hanh vai) OR (hanh va)) cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach tu) or (cach tu)) nang xa hoi. hieu van thanh huy va ((hanh vai) OR (hanh va)) cau tren*".