Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, truc nano
toc sach » hoc sach, doc sach, thuoc sach
cac luc » cau luc, coc luc, cac nuoc
tu nang » tu nong, tu nano, tu lang
hanh ca » hanh cac, hanh cat, hanh cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ca cua » co cua
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac
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) or (toc sach)) ((tu nang) or (tru nang)) ma hoi. hieu ve cac luc va hanh ca cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((tu nang) OR (tru nang)) ma hoi. hieu ve cac luc va hanh ca cua tu.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ((tu nang) or (tru nang)) ma hoi. hieu ve cac luc va hanh ca cua tu*.