Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
va thanh » gia thanh, ban thanh, va tinh
chang xu » chang xue, chao xu, thong xu
te sach » toc sach
cau duc » cao duc, cau luc, chu duc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
va cau » van cau, va cac, va dau
hang x » nang x, hoang xa, hang nxb
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((hang x) or (chang xu)) hoi. hieu va cau duc va thanh hai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((hang x) OR (chang xu)) hoi. hieu va cau duc va thanh hai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((hang x) or (chang xu)) hoi. hieu va cau duc va thanh hai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((hang x) or (chang xu)) hoi. hieu va cau duc va thanh hai ((cua te) OR (cua tu))*.