Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh dao » lanh dao, thanh dat, thanh dam
van hanh » van thanh, ban hanh, van anh
cac xuc » cam xuc, cac nuoc, chat xuc
tu nang » tru nang, tu nong, tu lang
dao cua » dai cua, day cua, dan cua
xuc van » duc van, luc van, vuc van
hieu ve » hieu va, hieu van
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: toc sach ((tu nang) or (((tu nano) OR (truc nano)))) ma hoi. hieu ve cac xuc van hanh dao cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tu nang) OR (((tu nano) OR (truc nano)))) ma hoi. hieu ve cac xuc van hanh dao cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((tu nang) or (((tu nano) OR (truc nano)))) ma hoi. hieu ve cac xuc van hanh dao cua tu".
• Adding a wildcard symbol may retrieve word variants: toc sach ((tu nang) or (((tu nano) OR (truc nano)))) ma hoi. hieu ve cac xuc van hanh dao cua tu*.