Perhaps you should try some spelling variations:
te sach » toc sach
quan li » quan ly, quan tri
quan vi » quan tri, quan doi
cua tuc » cua duc, cua tu, cua thuoc
cam tuc » cam tu, nam thuc, dam thuc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang

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