Perhaps you should try some spelling variations:
cau phuc » cau truc, chau phu, huu phuc
tu sach » thu sach, su sach, tu cach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
phuc va » phuc vu, thuc va, chuc va
hieu va » lieu va, hieu qua
hieu ve » hieu van
cuu tre » cua tre, cau tren, cau treo
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
vi cuu » vi luu, vinh cuu

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 (te sach)) ky tang ma hoi. ((hieu ve) or (hieu va)) cau phuc va danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky tang ma hoi. ((hieu ve) OR (hieu va)) cau phuc va danh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky tang ma hoi. ((hieu ve) or (hieu va)) cau phuc va danh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky tang ma hoi. ((hieu ve) or (hieu va)) cau phuc va danh vi cuu tre*.