Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hoc sach » hoc sinh, hoc cac, hoc anh
cham duc » pham duc, cham soc, pham duy
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
v nang » va nang, vu nang, van nang
vi ve » va ve, gi ve, vi he
ve ve » de ve, va ve, ke ve

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) or (hoc sach)) v nang xa hoi. hieu va cham duc van hanh ((vi ve) or (ve ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (hoc sach)) v nang xa hoi. hieu va cham duc van hanh ((vi ve) OR (ve ve)) triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (hoc sach)) v nang xa hoi. hieu va cham duc van hanh ((vi ve) or (ve ve)) triet*.