Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
ve triet » va trien, su triet
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, tao duoc
cuu tre » cua tre, cau tren, cau treo
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang xay hoi. hieu van ((lam duoc) OR (lam thuoc)) va dinh va ((cuu tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xay hoi. hieu van ((lam duoc) OR (lam thuoc)) va dinh va ((cuu tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang xay hoi. hieu van ((lam duoc) OR (lam thuoc)) va dinh va ((cuu tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xay hoi. hieu van ((lam duoc) OR (lam thuoc)) va dinh va ((cuu tre) or (ve triet))*.