Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang hanh » dang thanh, ban hanh, dang van
thuc dang » thuoc dang, thuc dan, thuc dung
hanh dai » hanh tai, hanh dao, vanh dai
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
hieu ha » hieu hoa, hieu ca, hieu xa

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 ky) OR (sach ty)) nang xa hoi. ((hieu ha) or (hieu va)) am thuc dang hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. ((hieu ha) OR (hieu va)) am thuc dang hanh dai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang xa hoi. ((hieu ha) or (hieu va)) am thuc dang hanh dai cua triet*".