Perhaps you should try some spelling variations:
lam duoc » nam duoc, luat duoc, lam thuoc
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cua tre » cua te, cua triet, dua tren
va hang » van hang, va nang, va lang
cuu tre » cau tren, cau treo
sach ty » sach y, sach tu, sach thu
lam luc » lao luc
xay hoi » xa hoi, tay hoi, cay phoi
ty dang » ty xang, ky dang, ty hang

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