Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
tu sach » thu sach, su sach, te sach
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ca viet » va viet, co viet, hoa viet
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
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: ((tu sach) or (thu hoach)) ky nang ma hoi. hieu va cam tuc va hanh de ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky nang ma hoi. hieu va cam tuc va hanh de ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu hoach)) ky nang ma hoi. hieu va cam tuc va hanh de ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky nang ma hoi. hieu va cam tuc va hanh de ((cua viet) OR (ca viet))*.