Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
tham thuc » nham thuc, pham thuc, tam thuc
danh viet » anh viet, ninh viet, nang viet
doc sach » hoc sach, toc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
viet cua » viec cua, viet ca, viet qua
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
cua te » cua tu
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 ky nang x hoi. hieu van ((tham thuc) or (nhan thuc)) va danh viet cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky nang x hoi. hieu van ((tham thuc) OR (nhan thuc)) va danh viet cua te.
• Adding a wildcard symbol may retrieve word variants: doc sach ky nang x hoi. hieu van ((tham thuc) or (nhan thuc)) va danh viet cua te*.