Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
tham thuc » nham thuc, tam thuc, thai thuc
danh kien » dinh kien, danh viet, linh kien
doc sach » hoc sach, toc sach, nuoc sach
hieu van » hieu va, thien van, lieu va
kien cuu » khien cua, khien cau, dien cuc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
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: doc sach ky nang xa hoi. hieu van ((tham thuc) OR (pham thuc)) va danh kien cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ky nang xa hoi. hieu van ((tham thuc) OR (pham thuc)) va danh kien cuu tre".
• Adding a wildcard symbol may retrieve word variants: doc sach ky nang xa hoi. hieu van ((tham thuc) OR (pham thuc)) va danh kien cuu tre*.