Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
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
cam tuc » cam xuc, cam tu, dam thuc
y lang » o lang, _ lang, tay lang
cua te » cua tu
cua cu » cua chu, cua cau, cua su

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 lang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) van hanh vi ((cua te) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) van hanh vi ((cua te) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) van hanh vi ((cua te) or (cua cu))".
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. hieu ve ((cam tuc) OR (nam thuc)) van hanh vi ((cua te) or (cua cu))*.