Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cau treo » cau theo, cau tren, cau triet
van hanh » van thanh, ban hanh, van anh
hanh va » hang va, hanh vi
xuc van » duc van, luc van, xuc ban
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
va cau » van cau, va cac, va dau
ve cam » ve cham, va cam, ve cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat sach)) ky nang ma hoi. hieu ((ve cam) or (ve cac)) xuc van hanh va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang ma hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh va cau treo.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang ma hoi. hieu ((ve cam) or (ve cac)) xuc van hanh va cau treo*.