Perhaps you should try some spelling variations:
phan than » phan thanh, phan tan, khan than
tham thuc » nham thuc, pham thuc, tam thuc
than cuu » than cua, than cui, thanh luu
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, su sach, te sach
va phan » van phan, va phat, va phap
thuc va » thuc vat, thuc dan, thuc day
va tham » van tham, va cham, va thanh
ky dang » ky nang
ky danh » ky anh
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (toc sach)) ((ky danh) OR (ky dang)) xa hoi. lieu va tham thuc va phan than cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ((ky danh) OR (ky dang)) xa hoi. lieu va tham thuc va phan than cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ((ky danh) OR (ky dang)) xa hoi. lieu va tham thuc va phan than cuu tre*".