Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
van tham » van thanh, van tuan, van chat
van cham » van chat, va cham, van pham
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach
va kinh » va tinh, qua kinh
kinh va » kinh van, tinh va, sinh va
tu cach » tu cac
xuc va » duc va, tuc va, luc va
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang cao hoi. hieu ((van cham) OR (van tham)) xuc va kinh va va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang cao hoi. hieu ((van cham) OR (van tham)) xuc va kinh va va thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky nang cao hoi. hieu ((van cham) OR (van tham)) xuc va kinh va va thieu".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang cao hoi. hieu ((van cham) OR (van tham)) xuc va kinh va va thieu*.