Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
thanh da » thanh dat, thanh dam, thanh dan
cau tren » cu tren, dau tren, cau treo
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
soc gia » toc gia, hoc gia, so gia
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 van) 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 van) OR (thien van)) cham soc gia thanh da ((cau tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang ma hoa. ((hieu van) 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 van) OR (thien van)) cham soc gia thanh da ((cau tren) or (ca tren))*.