Perhaps you should try some spelling variations:
kho tang » cao tang
sac kho » suc khoe, cac khoi, dac khoa
tang ma » mang may, tang van
ve cham » va cham, ve chat, vu cham
truc va » thuc va, thuc vat, trung va
va doan » va doanh, van doan, va dan
doan vi » doan va, don vi, doan thi
so sac » so sach, so dac
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cac, va cam, ve cai
vi hoc » li hoc, va hoc
hien » bien, vien, tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac kho tang ma hoi. hieu ((ve cam) OR (ve cham)) truc va doan vi hoc hien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac kho tang ma hoi. hieu ((ve cam) OR (ve cham)) truc va doan vi hoc hien".
• Adding a wildcard symbol may retrieve word variants: so sac kho tang ma hoi. hieu ((ve cam) OR (ve cham)) truc va doan vi hoc hien*.