Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
lam duoc » nam duoc, luat duoc, lam thuoc
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van lam » van nam
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cua te » cua tu

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