Perhaps you should try some spelling variations:
lam truc » lam truoc, nam truc, lam thuoc
hieu van » hieu va, thien van, lieu va
su sach » vu sach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
van lam » van nam
lang xa » lang ha, dang xay, lang van
ly lang » ly hang, ly vang, le lang
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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) OR (so sach)) ly lang xa hoi. hieu van lam truc ((va danh) or (va hanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ly lang xa hoi. hieu van lam truc ((va danh) OR (va hanh)) vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ly lang xa hoi. hieu van lam truc ((va danh) or (va hanh)) vi cuu tre*".