Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hien bach » vien bach, hien hanh, dien sach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
du cua » duy cua, dau cua, dum cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu ((hien bach) or (thien hach)) tuoc ((va danh) OR (va hanh)) du cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((hien bach) OR (thien hach)) tuoc ((va danh) OR (va hanh)) du cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((hien bach) or (thien hach)) tuoc ((va danh) OR (va hanh)) du cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((hien bach) or (thien hach)) tuoc ((va danh) OR (va hanh)) du cua tre*.