Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
va triet » va thiet, va trien, ve triet
hanh tai » thanh tai, hang tai, han tai
thu sach » thuat sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh van
thuc van » thuc vat, thuc dan, thuc va
tu sach » su sach, te sach, tu cach
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
ve cach » va cach, ve cac, ve canh

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)) ky dang xa hoi. hieu ve cach thuc van ((hanh vai) or (hanh tai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky dang xa hoi. hieu ve cach thuc van ((hanh vai) OR (hanh tai)) va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky dang xa hoi. hieu ve cach thuc van ((hanh vai) or (hanh tai)) va triet*.