Perhaps you should try some spelling variations:
ban quan » van quan
hanh ban » thanh ban, hang ban, hanh san
tu sach » thu sach, su sach, tu cach
huu loc » hau loc, muu luoc
va hanh » van hanh, va thanh, va danh
cau loc » hau loc, cau hoc, cau luc
hieu va » lieu va, hieu qua
te sach » toc sach
quan te » quan he, quan ve, quang tue

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