Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh vi » hanh vi, thanh va, thanh ve
truc dan » thuc dan, tuc dan, truc dai
truc ban » thuc ban, truc van, truoc bang
so sinh » so sanh, so tinh, cho sinh
nang ma » tang ma, sang ma, nang cao
sinh v » sinh va, sinh y, sinh vat
ve cam » ve cham, va cam, ve cai
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sinh v nang ma hoi. hieu ((ve cam) or (ve cac)) ((truc ban) OR (truc dan)) thanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sinh v nang ma hoi. hieu ((ve cam) OR (ve cac)) ((truc ban) OR (truc dan)) thanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sinh v nang ma hoi. hieu ((ve cam) or (ve cac)) ((truc ban) OR (truc dan)) thanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so sinh v nang ma hoi. hieu ((ve cam) or (ve cac)) ((truc ban) OR (truc dan)) thanh vi cua viet*.