Perhaps you should try some spelling variations:
dum tren » dua tren, duc tren, dung tren
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
va dan » ca dan, va dao, va dap
va dau » va dao
vi dum » vi du

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 ky nang x ho. ((hieu ve) or (hieu va)) cac xuc ((va dan) or (va dau)) vi dum tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x ho. ((hieu ve) OR (hieu va)) cac xuc ((va dan) OR (va dau)) vi dum tren.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x ho. ((hieu ve) or (hieu va)) cac xuc ((va dan) or (va dau)) vi dum tren*.