Perhaps you should try some spelling variations:
cau triet » cau trieu, cua triet, va triet
su triet » su viet, su tien, ve triet
nhan hai » nhanh hai, nhan tai, chan hai
ban nhan » ban than, van nhan, ban thanh
tuc ban » thuc ban, truc ban, tu ban
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ve cai » va cai, ve cac, ve tai
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

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 y nang ma hoi. hieu ((ve cai) or (va cam)) tuc ban nhan hai ((cau triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu ((ve cai) OR (va cam)) tuc ban nhan hai ((cau triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu ((ve cai) or (va cam)) tuc ban nhan hai ((cau triet) or (su triet))*.