Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
xuc ngan » luc ngan, luc nganh, cua ngan
cau tren » cu tren, dau tren, ca tren
tu sach » su sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho
hang » dang, bang, hanh

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 (thu sach)) ty nang x hoi. hieu ve cham ((xuc ngan) OR (vu ngan)) hang va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ve cham ((xuc ngan) OR (vu ngan)) hang va cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty nang x hoi. hieu ve cham ((xuc ngan) OR (vu ngan)) hang va cau tren*".