Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cham » va chat, va tham
soc van » hoc van, sac van, soc dan
luu tre » luu tru, cuu tre, luy tre
oc van » hoc van, luoc van, quoc van
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: te sach ky ((mang may) or (lang van)) hoi. hieu va cham ((soc van) OR (oc van)) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((mang may) OR (lang van)) hoi. hieu va cham ((soc van) OR (oc van)) hanh vi luu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((mang may) or (lang van)) hoi. hieu va cham ((soc van) OR (oc van)) hanh vi luu tre*".