Perhaps you should try some spelling variations:
dieu tra » dieu tri, kiem tra
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac thu » cach thuc, cac thoi
thu van » thuc van, thuy van, tu van
van anh » van thanh, tuan anh, van minh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
de cua » le cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ma hoi. hieu va cac thu van anh ((de cua) or (((dieu cua) OR (dieu tra)))) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu va cac thu van anh ((de cua) OR (((dieu cua) OR (dieu tra)))) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu va cac thu van anh ((de cua) or (((dieu cua) OR (dieu tra)))) triet*".