Perhaps you should try some spelling variations:
cam vuc » cam xuc
thap su » thap du, phap su, khap su
thai su » thai xu, tai su, thoi su
vuc van » duc van, luc van, thuc van
hieu ve » hieu va, hieu van
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
o lai » o lao
o hai » co hai, so hai, _ hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((o hai) or (o lai)). hieu ve cam vuc van minh ((thai su) or (thap su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((o hai) OR (o lai)). hieu ve cam vuc van minh ((thai su) OR (thap su)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((o hai) or (o lai)). hieu ve cam vuc van minh ((thai su) or (thap su)) triet*.