Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
nam truc » nam truoc, nam thuc, nam trung
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
sach v » sach va, sach y, sach 2
v lang » va lang, o lang, _ lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v lang xa hoi. hieu van ((cau truc) or (nam truc)) va hanh dai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v lang xa hoi. hieu van ((cau truc) OR (nam truc)) va hanh dai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v lang xa hoi. hieu van ((cau truc) or (nam truc)) va hanh dai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach v lang xa hoi. hieu van ((cau truc) or (nam truc)) va hanh dai ((cua triet) OR (su triet))*.