Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
tham thuc » nham thuc, tam thuc, thai thuc
cua triet » cua viet, su triet, va triet
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y nang xa hoi. hieu va ((tham thuc) OR (pham thuc)) van hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y nang xa hoi. hieu va ((tham thuc) OR (pham thuc)) van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang xa hoi. hieu va ((tham thuc) OR (pham thuc)) van hanh vi cua triet*.