Perhaps you should try some spelling variations:
thanh hoi » thanh hoai, thanh hoa, thanh hai
tan thanh » tran thanh, tang thanh, toan thanh
chat duc » chat doc, chet duoc, pham duc
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
hoi cuu » hoi chu, hoi cua, ho cuu
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
cuu tre » cua tre, cau tren, cau treo

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 y ((nang xa) or (nang x)) hoi. hieu van ((chat duc) OR (chat xuc)) tan thanh hoi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu van ((chat duc) OR (chat xuc)) tan thanh hoi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (nang x)) hoi. hieu van ((chat duc) OR (chat xuc)) tan thanh hoi cuu tre*".