Perhaps you should try some spelling variations:
trong van » trong cac
tang van » dang van, hoang van, tang luan
tham xuc » tham nuoc, tham thuc, pham duc
co sach » bo sach, cuon sach, hoc sach
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach thieu ((tang van) or (trong van)) hoi. hieu va tham xuc va hanh vi ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach thieu ((tang van) OR (trong van)) hoi. hieu va tham xuc va hanh vi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach thieu ((tang van) or (trong van)) hoi. hieu va tham xuc va hanh vi ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: co sach thieu ((tang van) or (trong van)) hoi. hieu va tham xuc va hanh vi ((cua te) OR (cua tu))*.