Perhaps you should try some spelling variations:
tang tai » hang tai, dung tai, sang tao
thanh vi » hanh vi, thanh va, thanh ve
cau treo » cau theo, cau tren, cau triet
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
tai hoi » tai khoi, dai hoi, tai hai
hieu va » lieu va, hieu qua
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (su sach)) ky tang tai hoi. hieu va cac ((duc gia) OR (quoc gia)) thanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (su sach)) ky tang tai hoi. hieu va cac ((duc gia) OR (quoc gia)) thanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) or (su sach)) ky tang tai hoi. hieu va cac ((duc gia) OR (quoc gia)) thanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (su sach)) ky tang tai hoi. hieu va cac ((duc gia) OR (quoc gia)) thanh vi cau treo*.