Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh tai » thanh tai, hang tai, han tai
trung va » truong va, trang va, trung ha
truc va » thuc va, thuc vat
so sinh » so sanh, so tinh, cho sinh
lv nang » ly nang
qua cam » qua cham, qua cac, qua ca
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang
tai va » thai va, mai va, tri va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sinh ((v nang) OR (lv nang)) ma hoi. hieu qua cam ((truc va) OR (trung va)) hanh tai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sinh ((v nang) or (lv nang)) ma hoi. hieu qua cam ((truc va) OR (trung va)) hanh tai va triet~".
• Adding a wildcard symbol may retrieve word variants: so sinh ((v nang) or (lv nang)) ma hoi. hieu qua cam ((truc va) OR (trung va)) hanh tai va triet*.