Perhaps you should try some spelling variations:
khanh thang » nhanh thang, thanh thang, khanh thanh
van khanh » van thanh, van hanh, van anh
thai cao » tai cao, thoai cac, thuat cao
su thai » su thi, su tai, su hai
cua tre » cua te, cua triet, dua tren
duc van » duc va, duc tan, duc manh
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
tang xa » trang xa, tang ma, tang ha
cuu tre » cau tren, cau treo

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

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