Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
nam tuc » nam thuc, nam truc, nam thuoc
hai cua » thai cua, dai cua, hoi cua
nam tu » nam thu, nam thuc
cua te » cua tu

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

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