Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
thuoc ma » hoc ma, duoc ma
thuoc va » thuc va, thuong va, thuoc tai
sach ky » sac ky, sach y, sach ty
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua
cua te » cua tu

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 ky nang xa hoi. ((hieu ve) or (hieu va)) nam ((thuoc va) OR (thuoc ma)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. ((hieu ve) OR (hieu va)) nam ((thuoc va) OR (thuoc ma)) thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. ((hieu ve) or (hieu va)) nam ((thuoc va) OR (thuoc ma)) thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. ((hieu ve) or (hieu va)) nam ((thuoc va) OR (thuoc ma)) thanh vi cua te*.