Perhaps you should try some spelling variations:
thu sac » thu sach, thu san, thu dac
thu xac » thau xay
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
va bac » van bac, va cac, va bai
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
va cuu » va cau, va chu, va huu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sac) or (thu xac)) ky nang xa hoi. lieu va bac bo ((va dan) OR (ca dan)) va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu xac)) ky nang xa hoi. lieu va bac bo ((va dan) OR (ca dan)) va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) or (thu xac)) ky nang xa hoi. lieu va bac bo ((va dan) OR (ca dan)) va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sac) or (thu xac)) ky nang xa hoi. lieu va bac bo ((va dan) OR (ca dan)) va cuu tre*.