Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
tai duc » tai cuc, mai duc, tai du
dan tai » van tai, dan thi, han tai
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
duc tre » duoc tren, duc tien
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau

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 (te sach)) ky nang ma hoi. hieu ((ve cham) OR (vu cham)) xuc va dan tai duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ma hoi. hieu ((ve cham) OR (vu cham)) xuc va dan tai duc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang ma hoi. hieu ((ve cham) OR (vu cham)) xuc va dan tai duc tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ma hoi. hieu ((ve cham) OR (vu cham)) xuc va dan tai duc tre*.