Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
dinh duc » tinh duc, sinh duoc, dinh chuc
ninh duc » tinh duc, sinh duoc, anh duc
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu va cham luc va ((((dinh duc) OR (ninh duc))) or (minh duc)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. hieu va cham luc va ((((dinh duc) OR (ninh duc))) OR (minh duc)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu va cham luc va ((((dinh duc) OR (ninh duc))) or (minh duc)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu va cham luc va ((((dinh duc) OR (ninh duc))) or (minh duc)) cuu tre*.