Perhaps you should try some spelling variations:
thanh ha » thanh hoa, thanh hai, nhanh ha
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
vu sac » vu sach, vu san, va sac
ve cac » va cac, vien cac
luc va » tuc va, loc va
ha cua » hoa cua, hai cua, nha cua

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

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