Perhaps you should try some spelling variations:
thien van » thi van
dan thai » dang thai, dan than, ban thai
cuu tre » cua tre, cau tren, cau treo
dan thi » dang thi, tran thi, dinh thi
cac tac » cac toc, cac bac, cac dac
cac tuc » cac toc, cac tu, cac nuoc
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

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