Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va cham » va chat, va tham
va danh » va dinh, va dan, va hanh
va cam » va cac, va cao, va cai
ki su » ky su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang x ho. hieu ((va cam) or (va cham)) tu ((va thanh) or (va danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x ho. hieu ((va cam) OR (va cham)) tu ((va thanh) OR (va danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x ho. hieu ((va cam) or (va cham)) tu ((va thanh) or (va danh)) ki su triet*.