Perhaps you should try some spelling variations:
thanh vinh » thanh binh, thanh tinh, than kinh
vinh cua » sinh cua, tinh cua, dinh cua
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » hieu qua
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va

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) or (toc sach)) ky tang ma hoi. ((hieu va) OR (lieu va)) cac xuc va thanh vinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky tang ma hoi. ((hieu va) OR (lieu va)) cac xuc va thanh vinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky tang ma hoi. ((hieu va) OR (lieu va)) cac xuc va thanh vinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky tang ma hoi. ((hieu va) OR (lieu va)) cac xuc va thanh vinh cua tre*.