Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
va triet » va thiet, va trien, ve triet
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
cua tu » cua tuc, cua su, cua cu

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 ky nang xa hoi. hieu va pham thuc van hanh di ((((cua tre) or (cua tu))) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu va pham thuc van hanh di ((((cua tre) OR (cua tu))) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va pham thuc van hanh di ((((cua tre) or (cua tu))) or (va triet))*.