Perhaps you should try some spelling variations:
thuat lap » thuat lanh, thuat xay, thuat bai
cau tren » cu tren, dau tren, ca tren
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
vai cau » va cau, van cau, vai cac
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va
nam tu » nam thu, nam thuc

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 (thuat lap)) ky lang xa hoi. ((hieu ve) OR (hieu van)) nam tu va hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat lap)) ky lang xa hoi. ((hieu ve) OR (hieu van)) nam tu va hanh vai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat lap)) ky lang xa hoi. ((hieu ve) OR (hieu van)) nam tu va hanh vai cau tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat lap)) ky lang xa hoi. ((hieu ve) OR (hieu van)) nam tu va hanh vai cau tren*.