Perhaps you should try some spelling variations:
thanh ca » thanh cha, thanh cac, thanh ha
thanh co » thanh do, thanh ho, thanh vo
cua tre » cua te, cuu tre, cua triet
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
van hoi » van hoc, van hoe, van loi
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
vu sac » vu sach, vu san, va sac

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 ((van hoi) OR (van hoa)). hieu va cac luc va ((thanh co) or (thanh ca)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky lang ((van hoi) OR (van hoa)). hieu va cac luc va ((thanh co) OR (thanh ca)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky lang ((van hoi) OR (van hoa)). hieu va cac luc va ((thanh co) or (thanh ca)) cua tre*".