Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
pham thuc » pham chuc, nham thuc, pham thu
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
va dan » ca dan, va dao, va dau
dan te » van te, dan tu, dan ve
te cua » tue cua, le cua, de cua
cua te » cua tu

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 (thu sach)) ty nang xa hoi. hieu ve ((pham thuc) or (phap thuc)) va dan te cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve ((pham thuc) OR (phap thuc)) va dan te cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang xa hoi. hieu ve ((pham thuc) or (phap thuc)) va dan te cua te*".