Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang dau » hang dau, xang dau, nang du
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
chat xuc » chat huu, cam xuc, chao xu
tinh lap » trinh lap, tinh lao, dinh lap
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
dau hoi » cau hoi, dai hoi, dan hoi
va tinh » may tinh
lap cua » lai cua, tap cua, lam cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang dau hoi. hieu van ((cac nuoc) or (chat xuc)) va tinh lap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang dau hoi. hieu van ((cac nuoc) OR (chat xuc)) va tinh lap cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang dau hoi. hieu van ((cac nuoc) or (chat xuc)) va tinh lap cua triet*.