Perhaps you should try some spelling variations:
thanh mang » thanh hang, hanh mang, nhanh mang
hieu van » thien van, lieu va, hieu ve
chat tuc » chat xuc, luat tuc, chat huu
mang cua » manh cua, dung cua, ban cua
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
tuc gia » tac gia, duc gia, toc gia
cua te » cua tu

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 nang ma hoa. ((hieu van) OR (hieu va)) chat tuc gia thanh mang cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ma hoa. ((hieu van) OR (hieu va)) chat tuc gia thanh mang cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang ma hoa. ((hieu van) OR (hieu va)) chat tuc gia thanh mang cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ma hoa. ((hieu van) OR (hieu va)) chat tuc gia thanh mang cua te*.