Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
tham thuc » nham thuc, tam thuc, thai thuc
toc sach » hoc sach, doc sach, thuoc sach
dan dinh » dang dinh, doan dinh, van dinh
dinh dau » dinh dat, dinh du, danh dau
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. thi van ((tham thuc) OR (pham thuc)) dan dinh dau cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. thi van ((tham thuc) OR (pham thuc)) dan dinh dau cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. thi van ((tham thuc) OR (pham thuc)) dan dinh dau cua tre*.