Perhaps you should try some spelling variations:
chieu toc » chieu tro, chieu tu, hieu hoc
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
toc cham » toc thai
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
ve triet » su triet
va trien » va truyen, va thiet, va tuyen
tu sach » thu sach, su sach, te sach
duc van » duc va, duc tan, duc manh
hanh de » hanh ve, hanh kem
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tru nang x hoi. chieu toc cham duc van hanh de ((ve triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru nang x hoi. chieu toc cham duc van hanh de ((ve triet) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang x hoi. chieu toc cham duc van hanh de ((ve triet) or (va trien))*.