Perhaps you should try some spelling variations:
phat duc » pham duc, phan duc, phan duoc
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve phat » va phat, te phat, de phat
duc van » duc va, duc tan, duc manh
su viet » so viet
y nang » ky nang, ly nang, v nang
vi su » va su, ve su, ki su

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 ve phat duc van hanh vi su viet~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve phat duc van hanh vi su viet*.