Perhaps you should try some spelling variations:
tuan khai » than khai, quang khai, tuong khai
khai cua » thai cua, hai cua, khi cua
van tuan » van quan, van ban, anh tuan
cua tre » cua te, cuu tre, cua triet
vu cham » va cham, vu kham, tu cham
duc van » duc va, duc tan, duc manh
ve cham » va cham, ve chat, ve chim
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
su can » su van, su cao, tu can
su cac » tu cac, su cao, eu cac

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

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