Perhaps you should try some spelling variations:
tham dang » pham dang, tham lang, tham dinh
sach tham » sach nha
cua viet » ca viet, hoa viet, cua vat
dang xay » dang van, van xay
su triet » su viet, su tien, ve triet
cam thuc » am thuc, nam thuc, cam thu
va danh » va dinh, va dan, dia danh
su sach » so sach, vu sach
va hanh » van hanh, va thanh, ban hanh
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tham dang xay hoi. hieu va cam thuc ((va hanh) or (va danh)) lai ((su triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tham dang xay hoi. hieu va cam thuc ((va hanh) OR (va danh)) lai ((su triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: su sach tham dang xay hoi. hieu va cam thuc ((va hanh) or (va danh)) lai ((su triet) or (cua viet))*.