Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
cua tuc » cua duc, cua tu, cua thuoc
ma hoi » mai hoi, xa hoi, ma hoa
cao vu » cao su, cao va, cao ve
cao tu » cao thu, co tu, cao su
vi cua » vai cua, di cua

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 ty nang ma hoi. hieu qua ((cao vu) OR (cao tu)) ban hanh vi cua tuc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. hieu qua ((cao vu) OR (cao tu)) ban hanh vi cua tuc".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu qua ((cao vu) OR (cao tu)) ban hanh vi cua tuc*.