Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham luc » than luc, tham nuoc, tham thuc
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
dan va » doan va, dan ca, ban va
tu van » tu va
luc va » duc va, tuc va, loc va
dan vi » doan vi, don vi, gan vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky lang xa hoi. hieu van tham luc va ((dan vi) OR (dan va)) ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky lang xa hoi. hieu van tham luc va ((dan vi) OR (dan va)) ((cua tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky lang xa hoi. hieu van tham luc va ((dan vi) OR (dan va)) ((cua tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu van ky lang xa hoi. hieu van tham luc va ((dan vi) OR (dan va)) ((cua tre) or (su triet))*.