Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
vu cham » va cham, vu kham, tu cham
hai cua » thai cua, dai cua, hoi cua
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, te sach, tu cach
hieu vu » hieu va, hieu ve, hieu su
su sach » so sach, vu sach
tuc va » truc va, tuc xa, duc va
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 (su sach)) ky nang x hoi. hieu vu cham ((tuc va) OR (thuc va)) hanh hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu vu cham ((tuc va) OR (thuc va)) hanh hai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang x hoi. hieu vu cham ((tuc va) OR (thuc va)) hanh hai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. hieu vu cham ((tuc va) OR (thuc va)) hanh hai cua tu*.