Perhaps you should try some spelling variations:
tieu tinh » trieu tinh, tieu trinh, lieu tinh
trong van » trong cac
tong cong » trong cong, cong cong, dung cong
trong va » trong ca, trong cac, trong nha
cong tap » cuong tap, cong tac, cong tan
tap quan » tac quan, hai quan
quan ha » quan he

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu tinh - dinh ((trong va) or (trong van)) tong cong tap quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - dinh ((trong va) OR (trong van)) tong cong tap quan ha.
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - dinh ((trong va) or (trong van)) tong cong tap quan ha*.