Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
van hanh » van thanh, ban hanh, van anh
cham luc » cham soc, nhan luc, cham cuu
nang ma » tang ma, sang ma, nang cao
tu sach » su sach, te sach, tu cach
luc van » luoc van, luu van, duc van
va cham » va chat, va tham
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
vi tut » vi rut
vi tu » voi tu, va tu, vu tu

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) or (tu sach)) y nang ma hoi. lieu va cham luc van hanh ((vi tu) OR (vi tut)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) y nang ma hoi. lieu va cham luc van hanh ((vi tu) OR (vi tut)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (tu sach)) y nang ma hoi. lieu va cham luc van hanh ((vi tu) OR (vi tut)) tren".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) y nang ma hoi. lieu va cham luc van hanh ((vi tu) OR (vi tut)) tren*.