Perhaps you should try some spelling variations:
pham sach » pham anh, nam sach, pham hanh
cham sac » cham soc, cap sac, cham mat
van kinh » va kinh, van minh, van dinh
cuu tre » cua tre, cau tren, cau treo
kinh ve » kinh te, dinh ve, minh ve
hieu vu » hieu ve, hieu su, dieu vu
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve cuu » ve cau, ve chu, ve cua
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) OR (pham sach)) van kinh ve cuu tre~.
• 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) OR (pham sach)) van kinh ve cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. ((hieu vu) or (hieu va)) ((cham sac) OR (pham sach)) van kinh ve cuu tre*.