Perhaps you should try some spelling variations:
su sach » vu sach
tinh vi » trinh vi, tinh voi, tinh va
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
va hoc » van hoc
luc va » tuc va, loc va
vi cua » vai cua, di cua

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 (so sach)) ky tang xa hoi. hieu va hoc ((luc va) or (duc va)) tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky tang xa hoi. hieu va hoc ((luc va) OR (duc va)) tinh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky tang xa hoi. hieu va hoc ((luc va) or (duc va)) tinh vi cua tre*".