Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thieu nien » thien nhien
thuoc sach » hoc sach, nuoc sach, thuoc sinh
bach khoe » bach khoa, bach hue, bach hoa
nien bach » vien bach, dien sach, mien bac
cua triet » cua viet, su triet, va triet
khoe ban » khien ban, khoe quan, khoi bay
tang mai » tang ma, tang tai, lang mai
ban hang » ngan hang
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
hang vi » hang va, hanh vi, hang di
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (thuoc sach)) ky tang mai hoi. thieu nien bach khoe ban hang vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuoc sach)) ky tang mai hoi. thieu nien bach khoe ban hang vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thuoc sach)) ky tang mai hoi. thieu nien bach khoe ban hang vi cua triet*.