Perhaps you should try some spelling variations:
truoc cach » cuoc cach, thuc cach, truoc cang
toc cach » hoc cach, toc sach, cuoc cach
van hanh » van thanh, ban hanh, van anh
pham huu » pham duc, pham duy, phan huy
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cua tre » cua te, cuu tre, cua triet
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 cach) OR (truoc cach)) tu nang xa hoi. hieu va ((chao xu) or (pham huu)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc cach) OR (truoc cach)) tu nang xa hoi. hieu va ((chao xu) OR (pham huu)) van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc cach) OR (truoc cach)) tu nang xa hoi. hieu va ((chao xu) or (pham huu)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc cach) OR (truoc cach)) tu nang xa hoi. hieu va ((chao xu) or (pham huu)) van hanh vi cua tre*.