Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac truc » cau truc, cac tru, cac trung
truc may » tren may, truc va
tinh dai » trinh dai, tinh da, tinh hai
su sach » so sach, vu sach
ty nang » ky nang, ty hang, ly nang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) or (ty xang)) mai hoi. hieu ve cac truc may tinh dai ((cua te) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) mai hoi. hieu ve cac truc may tinh dai ((cua te) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty xang)) mai hoi. hieu ve cac truc may tinh dai ((cua te) or (cua triet))*.