Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, hieu ve
cau phuc » cau truc, chau phu, huu phuc
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y nang ma hoi. ((hieu van) OR (lieu va)) cau phuc ((va hanh) or (va danh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang ma hoi. ((hieu van) OR (lieu va)) cau phuc ((va hanh) OR (va danh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang ma hoi. ((hieu van) OR (lieu va)) cau phuc ((va hanh) or (va danh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ma hoi. ((hieu van) OR (lieu va)) cau phuc ((va hanh) or (va danh)) dai cua tre*.