Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh tai » thanh hai, thanh toan, doanh tai
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
van lam » van nam
lam luc » lao luc, lam duoc
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky

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 y) or (sac ky)) nang mai hoi. hieu van lam luc va ((thanh van) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sac ky)) nang mai hoi. hieu van lam luc va ((thanh van) OR (thanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sac ky)) nang mai hoi. hieu van lam luc va ((thanh van) or (thanh tai)) cua tre*.