Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ve triet » va trien, su triet
hang tai » hang va, dung tai
va triet » va thiet, va trien, cua triet
tu thanh » thu thanh, su thanh, ta thanh
sach ky » sac ky, sach y, sach ty
vu sach » vu bach, su sach, vu khach
cam tuc » cam xuc, nam thuc, dam thuc
hieu ve » hieu va, hieu van
tai hoi » tai khoi, dai hoi, tai hai
ky hang » ky nang, ly hang, ky dang
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky hang tai hoi. hieu ve ((cam tuc) OR (cam tu)) tu thanh dai ((va triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky hang tai hoi. hieu ve ((cam tuc) OR (cam tu)) tu thanh dai ((va triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky hang tai hoi. hieu ve ((cam tuc) OR (cam tu)) tu thanh dai ((va triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky hang tai hoi. hieu ve ((cam tuc) OR (cam tu)) tu thanh dai ((va triet) or (ve triet))*.