Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » thuoc sach, thu hoach, khau sach
cau luoc » cau luc, muu luoc, hau loc
luoc van » luoc can, luoc va, luc van
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
tu sach » su sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve cau » ke cau, va cau, ve cac

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) OR (thuat sach)))) ty nang x ho. hieu ve cau luoc van hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((thu sach) OR (thuat sach)))) ty nang x ho. hieu ve cau luoc van hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (((thu sach) OR (thuat sach)))) ty nang x ho. hieu ve cau luoc van hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((thu sach) OR (thuat sach)))) ty nang x ho. hieu ve cau luoc van hanh lai chau tre*.