Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hang » ngan hang
te sach » toc sach
soc ban » hoc ban, coc ban, so ban
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu ve, hieu su, dieu vu
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ma hoi. ((hieu vu) or (hieu va)) cham soc ban hang va ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. ((hieu vu) OR (hieu va)) cham soc ban hang va ((cua triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. ((hieu vu) or (hieu va)) cham soc ban hang va ((cua triet) or (cuu tre))*.