Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban quan » van quan
hieu va » lieu va, hieu qua
cau loc » hau loc, cau hoc, cau luc
huu loc » hau loc, muu luoc
dan ban » van ban, can ban, dan ba
quan te » quan he, quan ve, quang tue
y nang » ly nang, v nang, may nang
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: thu sach ((y nang) OR (ky nang)) x ho. hieu va ((cau loc) or (huu loc)) va dan ban quan te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ky nang)) x ho. hieu va ((cau loc) OR (huu loc)) va dan ban quan te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (ky nang)) x ho. hieu va ((cau loc) or (huu loc)) va dan ban quan te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) OR (ky nang)) x ho. hieu va ((cau loc) or (huu loc)) va dan ban quan te*.