Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
van cau » van dau, van hau, van chat
dan hai » doan hai, dang hai, dan khai
hai cau » hai chau, hai chu, hai hau
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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 nang ma hoi. hieu ((van nam) or (van cau)) tuc va dan hai cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ma hoi. hieu ((van nam) OR (van cau)) tuc va dan hai cau triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ma hoi. hieu ((van nam) or (van cau)) tuc va dan hai cau triet*.