Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cau triet » cau trieu, su triet, cua triet
thu sach » tu sach, thuoc sach, thu hoach
nang xa » nang x, lang xa, mang xa
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, sang ma, nang cao
ve cam » ve cham, ve cac, va cam
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thuat sach)) ky ((nang xa) or (nang ma)) hoi. hieu ve cam duc va hanh vi cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky ((nang xa) OR (nang ma)) hoi. hieu ve cam duc va hanh vi cau triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) ky ((nang xa) or (nang ma)) hoi. hieu ve cam duc va hanh vi cau triet*.