Perhaps you should try some spelling variations:
cua tre » cua te, cuu tre, cua triet
nam duc » nam duoc, pham duc, nam thuc
ky sang » ky nang, duy sang
ky dang » ky nang, ky danh
dinh vi » dinh ve, dinh viet, dinh tri
ky tang » ky nang, kho tang, ky trong
va dinh » van dinh, va kinh, va tinh
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
te sac » te sach, te cac, te san
va nam » van nam, ha nam, va nay
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: te sac ((((ky sang) OR (ky dang))) or (ky tang)) ma hoi. hieu va nam duc va dinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((((ky sang) OR (ky dang))) OR (ky tang)) ma hoi. hieu va nam duc va dinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((((ky sang) OR (ky dang))) or (ky tang)) ma hoi. hieu va nam duc va dinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ((((ky sang) OR (ky dang))) or (ky tang)) ma hoi. hieu va nam duc va dinh vi cua tre*.