Perhaps you should try some spelling variations:
thanh thai » thanh hai, thanh tai, nhanh thai
pham duy » pham duc
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
duy gia » duy gian, duc gia, quy gia
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
cai hoi » cau hoi, dai hoi, cai hoa
ty nang » ky nang, ty hang, ly nang
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) or (ty xang)) cai hoi. hieu va pham duy gia thanh thai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) cai hoi. hieu va pham duy gia thanh thai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty xang)) cai hoi. hieu va pham duy gia thanh thai ((cua tre) or (cuu tre))*.