Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
doc sach » hoc sach, toc sach, nuoc sach
vat hanh » vat thanh, van hanh, va hanh
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (doc sach)) ky nang xa hoi. hieu v pham thuc vat hanh vi ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (doc sach)) ky nang xa hoi. hieu v pham thuc vat hanh vi ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (doc sach)) ky nang xa hoi. hieu v pham thuc vat hanh vi ((cua tre) or (va triet))*.