Perhaps you should try some spelling variations:
dat thanh » dao thanh, dat khanh, dang thanh
da thanh » dao thanh, dam thanh, dan thanh
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va nam » van nam, ha nam
va nay » va ngay, va cay

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. lieu ((va nam) OR (va nay)) thuc ((da thanh) or (dat thanh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. lieu ((va nam) OR (va nay)) thuc ((da thanh) OR (dat thanh)) doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. lieu ((va nam) OR (va nay)) thuc ((da thanh) or (dat thanh)) doi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. lieu ((va nam) OR (va nay)) thuc ((da thanh) or (dat thanh)) doi cua tre*.