Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
chat xuc » chat huu, cam xuc, chao xu
cham xuc » cam xuc, cham soc, pham duc
van hanh » van thanh, ban hanh, van anh
cua tuc » cua duc, cua thuoc, luat tuc
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
cua tu » cua su, cua cu, cua te
sach v » sach va, sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa
v tang » 6 tang, 7 tang, 5 tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v tang ma hoi. hieu ve ((cham xuc) or (chat xuc)) van hanh vi ((cua tuc) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v tang ma hoi. hieu ve ((cham xuc) OR (chat xuc)) van hanh vi ((cua tuc) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: toc sach v tang ma hoi. hieu ve ((cham xuc) or (chat xuc)) van hanh vi ((cua tuc) or (cua tu))*.