Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cham duc » pham duc, cham soc, pham duy
tang hoa » hang hoa, tang ha, tang ho
thanh ha » thanh hoa, thanh hai, nhanh ha
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
hieu ve » hieu van
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky tang hoa hoc. ((hieu ve) or (hieu va)) cham duc van thanh ha ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang hoa hoc. ((hieu ve) OR (hieu va)) cham duc van thanh ha ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang hoa hoc. ((hieu ve) or (hieu va)) cham duc van thanh ha ((cua tre) OR (cuu tre))*".