Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham doc » cham soc, chat doc, chau doc
cau tren » cu tren, dau tren, cau treo
nang xa » nang x, lang xa, nang ma
hieu tu » chieu tu, hieu tuc, hien tu
tu cham » toc cham, thi cham
va hanh » van hanh, va thanh, va danh
ca tren » cu tren, la tren, co tren
doc va » duoc va, hoc va, duc va

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) or (thu hoach)) ky nang xa hoi. hieu tu cham doc va hanh kem ((cau tren) OR (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thu hoach)) ky nang xa hoi. hieu tu cham doc va hanh kem ((cau tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thu hoach)) ky nang xa hoi. hieu tu cham doc va hanh kem ((cau tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thu hoach)) ky nang xa hoi. hieu tu cham doc va hanh kem ((cau tren) OR (ca tren))*.