Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
qua chat » qua nhat, qua cham, luan chat
chat duc » chat xuc, chat doc, chet duoc
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
te sach » toc sach
sach v » sach va, sach y, sach 2
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan 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 v ((nang xa) OR (nang ma)) hoi. hieu qua chat duc va dan vi ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v ((nang xa) OR (nang ma)) hoi. hieu qua chat duc va dan vi ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v ((nang xa) OR (nang ma)) hoi. hieu qua chat duc va dan vi ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: te sach v ((nang xa) OR (nang ma)) hoi. hieu qua chat duc va dan vi ((cua triet) or (cua viet))*.