Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
sach vuc » sach duoc, sach nuoc, sach truc
vuc nang » cuc nang, vu nang, chuc nang
hanh dai » hanh tai, hanh dao, vanh dai
duc manh » suc manh, duc anh, duc minh
te sach » toc sach
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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 duc manh hanh dai ((cua tu) OR (cua su))~.
• 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 duc manh hanh dai ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach vuc nang ((xa hoi) or (mai hoi)). hieu ve cam duc manh hanh dai ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: te sach vuc nang ((xa hoi) or (mai hoi)). hieu ve cam duc manh hanh dai ((cua tu) OR (cua su))*.