Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
kham tuc » nham thuc, kham cuoc, tham thuc
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
vi ve » va ve, gi ve, ve ve

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

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