Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
van tuan » van quan, van ban, anh tuan
tuan dai » toan dai, tuan tai, quang dai
ky dang » ky nang, ky danh
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((tay lang) or (ky dang)) xa hoi. hieu qua cac duc van tuan dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((tay lang) OR (ky dang)) xa hoi. hieu qua cac duc van tuan dai cua vat.
• Adding a wildcard symbol may retrieve word variants: tu san ((tay lang) or (ky dang)) xa hoi. hieu qua cac duc van tuan dai cua vat*.