Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
vuc nang » cuc nang, vu nang, chuc nang
hanh tai » thanh tai, hang tai, han tai
sach vuc » sach duoc, sach nuoc, sach truc
duc manh » suc manh, duc anh, duc minh
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
mai hoi » mai khoi, dai hoi, lai hoi
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
cua tu » cua tuc, cua su, cua cu

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 vuc nang ((xa hoi) or (mai hoi)). hieu ((ve cam) or (va cam)) duc manh hanh tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach vuc nang ((xa hoi) OR (mai hoi)). hieu ((ve cam) OR (va cam)) duc manh hanh tai cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach vuc nang ((xa hoi) or (mai hoi)). hieu ((ve cam) or (va cam)) duc manh hanh tai cua tu*.