Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
hanh hai » thanh hai, nhanh hai, hang hai
duc van » duc va, duc tan, duc manh
hai cua » thai cua, dai cua, hoi cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu
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 sac ky nang x hoi. ((((hieu van) or (thien van))) or (lieu va)) pham duc van hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. ((((hieu van) OR (thien van))) OR (lieu va)) pham duc van hanh hai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((((hieu van) or (thien van))) or (lieu va)) pham duc van hanh hai cua te*.