Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
thuat sac » thuat sach, thuat san, thuat tac
duc tran » duc tan, duc toan, duc tren
nang xa » lang xa, nang ma, mang xa
lam cua » nam cua, lam chat
lap cua » lai cua, tap cua, ap cua
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
ve cao » va cao, ve bao, ve cac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky ((nang xa) or (nang x)) hoi. hieu ve cao duc tran thanh ((lap cua) OR (lam cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky ((nang xa) OR (nang x)) hoi. hieu ve cao duc tran thanh ((lap cua) OR (lam cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky ((nang xa) or (nang x)) hoi. hieu ve cao duc tran thanh ((lap cua) OR (lam cua)) tu".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky ((nang xa) or (nang x)) hoi. hieu ve cao duc tran thanh ((lap cua) OR (lam cua)) tu*.