Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
tuc va » truc va, tuc xa, duc va

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 (co sach)) ky nang xa hoi. hieu ve chat ((tuc va) OR (thuc va)) thanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ky nang xa hoi. hieu ve chat ((tuc va) OR (thuc va)) thanh vai cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (co sach)) ky nang xa hoi. hieu ve chat ((tuc va) OR (thuc va)) thanh vai cua vat*".