Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
toc cham » toc thai
ve triet » su triet
sach tru » sach truc, sach thu, sach tu
cham duc » pham duc, cham soc, pham duy
va trien » va truyen, va thiet, va tuyen
hieu toc » hieu hoc, hieu tuc, sieu toc
tru nang » tra nang, tri nang, truc nano
nang xa » nang x, lang xa, nang ma
danh de » hanh de, dang de, danh di
dan de » dan den, dang de, van de

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach tru nang xa hoi. hieu toc cham duc va ((danh de) or (dan de)) ((ve triet) OR (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tru nang xa hoi. hieu toc cham duc va ((danh de) OR (dan de)) ((ve triet) OR (va trien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tru nang xa hoi. hieu toc cham duc va ((danh de) or (dan de)) ((ve triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: thu sach tru nang xa hoi. hieu toc cham duc va ((danh de) or (dan de)) ((ve triet) OR (va trien))*.