Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
cham duc » pham duc, cham soc, pham duy
hanh doi » thanh doi, hanh noi, hanh moi
hang doi » hang di, hang loi, huong doi
te sach » toc sach
ky lang » ky dang, ky tang, tay lang
van hoe » van hoa, van hoc, van hieu
cua tu » cua tuc, cua su, cua cu

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 ((ky lang) OR (ky nang)) van hoe. hieu qua cham duc va ((hanh doi) or (hang doi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) van hoe. hieu qua cham duc va ((hanh doi) OR (hang doi)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky nang)) van hoe. hieu qua cham duc va ((hanh doi) or (hang doi)) cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky nang)) van hoe. hieu qua cham duc va ((hanh doi) or (hang doi)) cua tu*.