Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
cac duc » cac du, cao duc, cac dac
hang x » hoang xa, chang xu, 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 (nang x)) hoi. lieu va cac duc va thanh dai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((hang x) OR (nang x)) hoi. lieu va cac duc va thanh dai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((hang x) or (nang x)) hoi. lieu va cac duc va thanh dai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((hang x) or (nang x)) hoi. lieu va cac duc va thanh dai ((cua te) OR (cua tu))*.