Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
ly nang » ky nang, ly hang, ly vang
thi van » thi lan, thi hanh, thi nang
nam mua » nam cua, nam qua, nam xua
mua van » ma van, mua ban, mua dan

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)) ly nang ((xa hoi) or (ma hoa)). thi van nam mua van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ly nang ((xa hoi) OR (ma hoa)). thi van nam mua van hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) ly nang ((xa hoi) or (ma hoa)). thi van nam mua van hanh dai cua triet*.