Perhaps you should try some spelling variations:
tay quang » tac quang, tai quang, tao quang
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cac thu » cach thuc, cac thoi
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cac tu » cach tu, cac du, tac tu
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((tay quang) or (ky nang)) xa hoi. hieu va ((cac tu) or (cac thu)) va danh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tay quang) OR (ky nang)) xa hoi. hieu va ((cac tu) OR (cac thu)) va danh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((tay quang) or (ky nang)) xa hoi. hieu va ((cac tu) or (cac thu)) va danh vi ve triet*.