Perhaps you should try some spelling variations:
lam truc » lam truoc, nam truc, lam thuoc
hieu van » hieu va, thien van, lieu va
lang van » dang van, tang van, hoang van
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
van lam » van nam
sach ly » sach lo, sach ty, sach hay
lang xa » lang ha, dang xay
luu tre » luu tru, cuu tre, luy tre
vi luu » vi lua

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