Perhaps you should try some spelling variations:
thanh vai » thanh van, thanh tai, thanh oai
thanh hai » thanh phan, thanh hoa, thanh san
van nang » van quang, van ban, van dong
hieu van » hieu va, thien van, lieu va
sach dao » lanh dao
nang tuc » nang thuc, nang luc, nang tu
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet

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

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