Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau loc » hau loc, cau hoc, cau luc
dan ban » van ban, can ban, dan bac
huu loc » hau loc, muu luoc
hieu va » lieu va, hieu qua
quan te » quan he, quan ve, quang tue
y nang » ky nang, ly nang, v nang
dan ba » dan bac, dan ca, dan va

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 x ho. hieu va ((cau loc) or (huu loc)) va ((dan ban) OR (dan ba)) quan te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x ho. hieu va ((cau loc) OR (huu loc)) va ((dan ban) OR (dan ba)) quan te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x ho. hieu va ((cau loc) or (huu loc)) va ((dan ban) OR (dan ba)) quan te".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x ho. hieu va ((cau loc) or (huu loc)) va ((dan ban) OR (dan ba)) quan te*.