Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
trien cua » truyen cua, trien nha, tri cua
doc sach » hoc sach, toc sach, nuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
dan danh » van danh, han danh, ban danh
dien cua » dieu cua, dien cuc, dien cu
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ty nang x hoi. hieu va cham thuc dan danh ((dien cua) or (trien cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ty nang x hoi. hieu va cham thuc dan danh ((dien cua) OR (trien cua)) te.
• Adding a wildcard symbol may retrieve word variants: doc sach ty nang x hoi. hieu va cham thuc dan danh ((dien cua) or (trien cua)) te*.