Perhaps you should try some spelling variations:
hoc viet » hoc hien
cham xuc » cam xuc, chat xuc, cham soc
va tinh » may tinh
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
ma hoi » mai hoi, xa hoi, ma hoa
vi hoc » li hoc, va hoc
so sac » so sach, so dac

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 ((ky tang) or (ky dang)) ma hoi. hieu ve cham xuc ((va danh) or (va tinh)) vi hoc viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ((ky tang) OR (ky dang)) ma hoi. hieu ve cham xuc ((va danh) OR (va tinh)) vi hoc viet.
• Adding a wildcard symbol may retrieve word variants: so sac ((ky tang) or (ky dang)) ma hoi. hieu ve cham xuc ((va danh) or (va tinh)) vi hoc viet*.