Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
xa thanh » va thanh, ha thanh, ta thanh
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
nam tuc » nam thuc, nam truc, nam tu
cua tu » cua tuc, cua cu, cua vu
cua su » qua su

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