Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
soc va » hoc va, loc va, doc va
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 ((dang xay) or (nang ma)) hoi. hieu ve cham soc va hanh vi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((dang xay) OR (nang ma)) hoi. hieu ve cham soc va hanh vi ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((dang xay) or (nang ma)) hoi. hieu ve cham soc va hanh vi ((cuu tre) or (cua triet))*.