Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
thuc van » thuc vat, thuc dan, thuc va
sach hoi » sach doi, sach moi, hoach hoi
tuc van » truc van, tuc va, duc van
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
lang xa » lang ha, dang xay, lang van
ve cam » ve cham, ve cac, va cam
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 hoi) OR (cach thoi)) lang xa hoi. hieu ve cam ((tuc van) or (thuc van)) hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach hoi) OR (cach thoi)) lang xa hoi. hieu ve cam ((tuc van) OR (thuc van)) hanh vi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach hoi) OR (cach thoi)) lang xa hoi. hieu ve cam ((tuc van) or (thuc van)) hanh vi cua tuc".
• Adding a wildcard symbol may retrieve word variants: te ((sach hoi) OR (cach thoi)) lang xa hoi. hieu ve cam ((tuc van) or (thuc van)) hanh vi cua tuc*.