Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, hang hai, hanh tai
van cam » van nam, van lam, van cau
nang ma » tang ma, sang ma, nang cao
cam duc » cam xuc, cao duc, pham duc
tu ban » thu ban, te ban
ban ky » van ky, dan ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ky ((nang ma) or (nang x)) hoi. hieu van cam duc va ((hanh hai) OR (nhanh hai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky ((nang ma) OR (nang x)) hoi. hieu van cam duc va ((hanh hai) OR (nhanh hai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ky ((nang ma) or (nang x)) hoi. hieu van cam duc va ((hanh hai) OR (nhanh hai)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu ban ky ((nang ma) or (nang x)) hoi. hieu van cam duc va ((hanh hai) OR (nhanh hai)) cua te*.