Perhaps you should try some spelling variations:
tang van » dang van, hoang van, trong van
dua tren » dung tren
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
suc van » su van, duc van, luc van
cuu tre » cua tre, cau tren, cau treo
y tang » ky tang, 6 tang, 7 tang
ve cao » va cao, ve cac, ve co
ve bao » te bao, va bao

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 y tang van hoa. hieu ((ve cao) OR (ve bao)) suc van hanh vi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang van hoa. hieu ((ve cao) OR (ve bao)) suc van hanh vi ((dua tren) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang van hoa. hieu ((ve cao) OR (ve bao)) suc van hanh vi ((dua tren) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach y tang van hoa. hieu ((ve cao) OR (ve bao)) suc van hanh vi ((dua tren) or (cuu tre))*.