Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
dang thanh » dong thanh, dang hanh, hoang thanh
thanh dat » thanh san, thanh hai, thanh van
tdung dat » trung dai, vung dat, dong dat
dat dung » dan dung, vat dung, da dung
dung dat » dung va, dung tai
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - dang thanh dat dung ((tdung dat) or (dung dat)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - dang thanh dat dung ((tdung dat) OR (dung dat)) phan dau.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - dang thanh dat dung ((tdung dat) or (dung dat)) phan dau*.