Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
su triet » su viet, su tien, ve triet
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
va cham » va chat, va tham
truc va » thuc va, thuc vat, trung va
danh ki » danh di, danh kien, danh gia
tu sach » thu sach, su sach, te sach
tuc va » thuc va, tuc xa, duc va
ki su » ky su

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 (thuoc sach)) ky tang xa hoi. lieu va cham ((tuc va) OR (truc va)) danh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky tang xa hoi. lieu va cham ((tuc va) OR (truc va)) danh ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuoc sach)) ky tang xa hoi. lieu va cham ((tuc va) OR (truc va)) danh ki su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ky tang xa hoi. lieu va cham ((tuc va) OR (truc va)) danh ki su triet*.