Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
van lam » van nam
lam luc » lao luc, lam duoc
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
ca viet » va viet, hoa viet, san viet
co viet » so viet, o viet, hoc viet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang x hoi. hieu van lam luc va hang di ((ca viet) OR (co viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu van lam luc va hang di ((ca viet) OR (co viet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu van lam luc va hang di ((ca viet) OR (co viet))*.