Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thu sach » thuat sach, thuoc sach, thu hoach
danh kem » hanh kem, banh kem, danh kien
hieu van » hieu va, thien van, lieu va
cau tuc » cau tu, cau luc, cau phuc
kem cua » em cua, keo cua, diem cua
va danh » va dinh, va dan, va hanh
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang

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 (thu sach)) ty nang ma hoa. hieu van ((cau tuc) or (cau truc)) va danh kem cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang ma hoa. hieu van ((cau tuc) OR (cau truc)) va danh kem cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang ma hoa. hieu van ((cau tuc) or (cau truc)) va danh kem cua viet*".