Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
toc sach » hoc sach, doc sach, thuoc sach
tang van » dang van, hoang van, trong van
cham tuc » nham thuc, tham thuc, cham soc
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang
vi cua » vai cua, di cua

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 y tang van hoa. hieu ve ((cham tuc) or (pham thuc)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y tang van hoa. hieu ve ((cham tuc) OR (pham thuc)) van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y tang van hoa. hieu ve ((cham tuc) or (pham thuc)) van hanh vi cua tre*.