Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam truc » cau truc, nam truc, lam truoc
ky lang » ky nang, ky dang, ky tang
ky danh » ky anh, ky dang
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
dan dat » dung dat, dong dat, dinh dat
dat cua » dai cua, day cua, mat cua
tu sach » thu sach, su sach, te sach
ve cam » ve cham, ve cac, va cam
va dan » ca dan, va dao, va dau

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 (thu hoach)) ((ky lang) or (ky danh)) xa hoi. hieu ve cam truc va dan dat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ((ky lang) OR (ky danh)) xa hoi. hieu ve cam truc va dan dat cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ((ky lang) or (ky danh)) xa hoi. hieu ve cam truc va dan dat cua triet*.