Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
hai cau » hai chau, hai chu, hai hau
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu va cam ((xuc va) or (tuc va)) hanh hai cau tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang o hoi. hieu va cam ((xuc va) OR (tuc va)) hanh hai cau tao.
• Adding a wildcard symbol may retrieve word variants: su sach y nang o hoi. hieu va cam ((xuc va) or (tuc va)) hanh hai cau tao*.