Perhaps you should try some spelling variations:
may nang » may nong, ky nang, cam nang
hang hai » hoang hai, hang tai, thanh hai
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
va hang » van hang, va lang, va hanh
cua tuc » cua duc, cua tu, cua thuoc
va nang » van nang, da nang, cam nang
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((may nang) or (va nang)) cau hoi. hieu ((ve cam) OR (ve cac)) duc va hang hai cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((may nang) OR (va nang)) cau hoi. hieu ((ve cam) OR (ve cac)) duc va hang hai cua tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((may nang) or (va nang)) cau hoi. hieu ((ve cam) OR (ve cac)) duc va hang hai cua tuc*".