Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cham sac » cham soc, pham sach, cap sac
van kinh » va kinh, van minh, van dinh
cuu tre » cua tre, cau treo
kinh ve » kinh te, dinh ve, minh ve
sac van » cac van, san van, sat van
hieu va » lieu va, hieu qua
hieu vu » hieu ve, hieu su, dieu vu
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
tu sac » tu sach, tu cac, tu san

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. ((hieu vu) OR (hieu va)) cham sac van kinh ve ((cuu tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ma hoi. ((hieu vu) or (hieu va)) cham sac van kinh ve ((cuu tre) OR (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. ((hieu vu) or (hieu va)) cham sac van kinh ve ((cuu tre) OR (cau tren))*.