Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ky tang » ky nang, ky dang, kho tang
tai cua » thai cua, tai cuc, tri cua
tan tai » toan tai, tang tai, tuan tai
van tan » van tuan, van ban, van tai
luc van » luoc van, luu van, duc van
sinh ky » sinh ly, sinh y, kinh ky
ve cam » ve cham, ve cac, va cam
va cao » va cac, va co, va dao
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ky tang ((ma hoi) or (xa hoi)). hieu ((ve cam) or (va cao)) luc van tan tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ky tang ((ma hoi) OR (xa hoi)). hieu ((ve cam) OR (va cao)) luc van tan tai cua triet.
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky tang ((ma hoi) or (xa hoi)). hieu ((ve cam) or (va cao)) luc van tan tai cua triet*.