Perhaps you should try some spelling variations:
hoi thuc » choi thuc, hoc thuc, hoi chuc
danh hoi » danh hoa, dan hoi, danh hoc
thuc te » thuc tien
vu sach » vu bach, su sach, vu khach
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va
vu sac » vu san, va sac, vu cac
xac va » tac va, ac va, bac va
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sac) or (vu sach)) ky tang ma hoi. hieu ve cam ((xac va) or (luc va)) danh hoi thuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sac) OR (vu sach)) ky tang ma hoi. hieu ve cam ((xac va) OR (luc va)) danh hoi thuc te.
• Adding a wildcard symbol may retrieve word variants: ((vu sac) or (vu sach)) ky tang ma hoi. hieu ve cam ((xac va) or (luc va)) danh hoi thuc te*.