Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
danh dien » dinh dien, danh kien, danh lien
thuc dan » thuc hanh, hoc dan, thuc vat
dan danh » van danh, han danh, ban danh
dien cua » dieu cua, dien cuc, dien cu
doc sac » doc sach, dac sac, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sac ky nang xa hoi. hieu va tham thuc dan danh dien cua tre~.
• Adding a wildcard symbol may retrieve word variants: doc sac ky nang xa hoi. hieu va tham thuc dan danh dien cua tre*.