Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
te sach » toc sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
truc va » thuc va, thuc vat, trung va
cua te » cua tu
tuc va » thuc va, tuc xa, duc va

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 lang xa hoi. hieu van nam ((tuc va) OR (truc va)) danh sai ((va triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu van nam ((tuc va) OR (truc va)) danh sai ((va triet) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu van nam ((tuc va) OR (truc va)) danh sai ((va triet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu van nam ((tuc va) OR (truc va)) danh sai ((va triet) or (cua te))*.