Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cau triet » cau trieu, su triet, cua triet
cau theo » cau thi, cau tao
cac truc » cau truc, cac tru, cac trung
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac

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) or (thuat sach)) ky lang xa hoi. hieu ve cac truc va hanh vi ((cau theo) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky lang xa hoi. hieu ve cac truc va hanh vi ((cau theo) OR (cau triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky lang xa hoi. hieu ve cac truc va hanh vi ((cau theo) or (cau triet))*.