Perhaps you should try some spelling variations:
khanh van » thanh van, khanh vinh, hanh va
hanh tai » thanh tai, hang tai, han tai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
ve nam » he nam, va nam, le nam
nam tu » nam thu, nam thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (v nang)) xa hoi. hieu ve nam tu va ((khanh van) or (hanh tai)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. hieu ve nam tu va ((khanh van) OR (hanh tai)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) xa hoi. hieu ve nam tu va ((khanh van) or (hanh tai)) cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (v nang)) xa hoi. hieu ve nam tu va ((khanh van) or (hanh tai)) cua viet*.