Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, thanh dat
vanh dai » van dai, vanh tai, lanh dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
sai ky » sac ky
va cau » van cau, va cac, va dau

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

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