Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, cau treo
thanh da » thanh dat, thanh dam, thanh dan
sach ty » sach y, sach tu, sach thu
soc gia » toc gia, hoc gia, so gia
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ca tren » cu tren, la tren, co tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang ma hoa. ((hieu va) or (thien van)) cham soc gia thanh da ((cau tren) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang ma hoa. ((hieu va) OR (thien van)) cham soc gia thanh da ((cau tren) OR (ca tren)).
• Adding a wildcard symbol may retrieve word variants: so sach ty nang ma hoa. ((hieu va) or (thien van)) cham soc gia thanh da ((cau tren) or (ca tren))*.