Perhaps you should try some spelling variations:
cua triet » su triet, va triet
dang xay » dang van, van xay
vanh dai » van dai, vanh tai, lanh dao
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
va vanh » va van, va danh, va hanh

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) or (dang xay)) hoi. thi van cau truc va vanh dai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang x) OR (dang xay)) hoi. thi van cau truc va vanh dai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang x) or (dang xay)) hoi. thi van cau truc va vanh dai ((cua triet) or (cua viet))*.