Perhaps you should try some spelling variations:
dang xay » dang van, van xay
thuc van » thuc vat, thuc dan, thuc va
te sach » toc sach
hieu ve » hieu va, hieu van
lang xa » lang ha, lang van
cua tuc » cua duc, cua tu, cua thuoc
sach o » sach lo, sac o, sach y
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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 o ((lang xa) OR (dang xay)) hoi. hieu ve cam ((tuc va) or (thuc van)) hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o ((lang xa) OR (dang xay)) hoi. hieu ve cam ((tuc va) OR (thuc van)) hanh vi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach o ((lang xa) OR (dang xay)) hoi. hieu ve cam ((tuc va) or (thuc van)) hanh vi cua tuc".
• Adding a wildcard symbol may retrieve word variants: te sach o ((lang xa) OR (dang xay)) hoi. hieu ve cam ((tuc va) or (thuc van)) hanh vi cua tuc*.