Perhaps you should try some spelling variations:
thuoc tai » nuoc tai, hoc tai, thuc tap
thanh vi » hanh vi, thanh va, thanh ve
thuoc ma » hoc ma, duoc ma
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
ve nam » he nam, va nam, le nam
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 lang) OR (ky tang)) xa hoi. hieu ve nam ((thuoc tai) or (thuoc ma)) thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky lang) OR (ky tang)) xa hoi. hieu ve nam ((thuoc tai) OR (thuoc ma)) thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky lang) OR (ky tang)) xa hoi. hieu ve nam ((thuoc tai) or (thuoc ma)) thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) OR (ky tang)) xa hoi. hieu ve nam ((thuoc tai) or (thuoc ma)) thanh vi cua te*.