Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
mai khoi » mai khoa, tai khoa, cac khoi
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
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: te sach vu nang ((ma hoi) or (mai khoi)). hieu ((ve cam) OR (va cam)) duc va hanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vu nang ((ma hoi) OR (mai khoi)). hieu ((ve cam) OR (va cam)) duc va hanh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vu nang ((ma hoi) or (mai khoi)). hieu ((ve cam) OR (va cam)) duc va hanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: te sach vu nang ((ma hoi) or (mai khoi)). hieu ((ve cam) OR (va cam)) duc va hanh hai cua te*.