Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
cam tu » cam thu, nam tu, dam tu
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 hoi. hieu ve ((cam tu) or (cam xuc)) van hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang xa hoi. hieu ve ((cam tu) OR (cam xuc)) van hanh vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: te sach o lang xa hoi. hieu ve ((cam tu) or (cam xuc)) van hanh vi cua tuc*.