Perhaps you should try some spelling variations:
nham thu » nham thuc, nam thu, pham thu
vai cua » hai cua, lai cua, bai cua
xa tinh » va tinh, ha tinh, ca tinh
va nham » va cham, va tham, va nha
tu sach » thu sach, su sach, tu cach
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
thu xa » thu xac, thu ha, thu xe

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang ma hoi. hieu va nham thu xa tinh ((vai cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ma hoi. hieu va nham thu xa tinh ((vai cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang ma hoi. hieu va nham thu xa tinh ((vai cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ma hoi. hieu va nham thu xa tinh ((vai cua) OR (dai cua)) triet*.