Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
cuu tong » cuu cong, cuu tinh, huu tung
thuc van » thuc vat, thuc dan, thuc va
truc van » truc va, truc ban, truc dan
doi cua » dai cua, hoi cua
su sach » so sach, vu sach
uu nang » cuu nang, vu nang, cuu nong
qua cac » cua cac
x hoi » xa hoi, o hoi, x ho

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 ((uu nang) or (cuu tong)) x hoi. hieu qua cac ((truc van) OR (thuc van)) hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((uu nang) OR (cuu tong)) x hoi. hieu qua cac ((truc van) OR (thuc van)) hanh doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((uu nang) or (cuu tong)) x hoi. hieu qua cac ((truc van) OR (thuc van)) hanh doi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((uu nang) or (cuu tong)) x hoi. hieu qua cac ((truc van) OR (thuc van)) hanh doi cua triet*.